Free AI & Crypto Tools
Open-source tools for AI agents, crypto analysis, and directory building. No signup required.
AI Agent Tools
Agent Glossary
Comprehensive glossary of AI agent terminology and concepts
Agent Comparison
Compare AI agent platforms side by side
Cost Calculator
Estimate the cost of deploying AI agents
ROI Calculator
Calculate return on investment for AI agent deployments
Template Gallery
Browse templates for AI agent company structures
Org Chart Builder
Build organizational charts for AI agent teams
Benchmark Tracker
Track and compare AI agent performance benchmarks
Readiness Assessment
Assess your organization's readiness for AI agents
Task Analyzer
Analyze task complexity for AI agent automation
Stack Builder
Build your ideal AI agent technology stack
AI Tools Directory
Browse 30+ AI tools and platforms — agent frameworks, LLM APIs, code assistants, image generators, and more.
Blockchain Intel API
Real-time and historical blockchain company intelligence. Free semantic search API for AI agents and LLMs.
API Docs
Full API reference — free and premium endpoints for blockchain intelligence, semantic search, and glossary lookup.
Blockchain Directory
Explore 114+ blockchain projects with real-time intelligence — prices, news, GitHub activity, Twitter, and Reddit.
AI Article Generator
Generate free AI-powered articles about crypto, AI, and tech using real-time intel data
DeFi Directory
Explore 114+ DeFi protocols with real-time intelligence — prices, TVL news, GitHub activity, Twitter, and Reddit.
DevTools Directory
Explore 155+ developer tools, SDKs, and infrastructure projects with real-time intelligence from GitHub, news, and social.
Crypto Tools
Top Crypto to Watch
Live crypto watchlist with price data, staking yields, Cosmos ecosystem metrics, and trending movers
Meme Coin Comparison
Compare meme coins across metrics and market data
Meme Coin Tracker
Track meme coin prices and trends in real time
Crypto ROI Calculator
Calculate returns on cryptocurrency investments
Crypto Sentiment
Monitor cryptocurrency market sentiment and social signals
New Launches
Discover newly launched meme coins and tokens
Gas Estimator
Estimate gas fees for Ethereum, Base, and Cosmos transactions
Wallet Analyzer
Analyze wallet address patterns and validate formats for Ethereum, Cosmos, and Bitcoin
Impermanent Loss Calculator
Calculate impermanent loss from providing liquidity to an AMM pool
DCA Calculator
Calculate dollar-cost averaging returns over a given period
Staking Rewards Calculator
Estimate staking rewards based on APY, amount staked, and duration
Token Vesting Schedule Calculator
Calculate token unlock schedule with cliff and linear vesting periods
Crypto Tax Estimator
Estimate capital gains tax on crypto trades (simple gain/loss calculation)
Portfolio Allocation Calculator
Calculate optimal portfolio allocation across multiple crypto assets
Mining Profitability Calculator
Estimate mining profitability based on hashrate, power costs, and difficulty
Liquidation Price Calculator
Calculate the liquidation price for leveraged crypto positions
Position Size Calculator
Calculate optimal position size based on risk tolerance and stop-loss
Risk/Reward Ratio Calculator
Calculate the risk/reward ratio for a trade setup
Break-Even Price Calculator
Calculate the break-even price after fees and multiple entries
Token Supply Calculator
Calculate circulating supply, total supply ratios, and inflation rate
APY to APR Converter
Convert Annual Percentage Yield (APY) to Annual Percentage Rate (APR)
APR to APY Converter
Convert Annual Percentage Rate (APR) to Annual Percentage Yield (APY)
Wei to Ether Converter
Convert between Wei, Gwei, and Ether denominations
Satoshi to Bitcoin Converter
Convert between Satoshi and Bitcoin denominations
Gwei to Ether Converter
Convert between Gwei and Ether for gas price calculations
Token Price Impact Estimator
Estimate price impact of a trade on a constant-product AMM (x*y=k)
Yield Farming Calculator
Calculate potential yield farming returns including rewards and fees
NFT Royalty Calculator
Calculate NFT royalty earnings from secondary sales
Crypto Profit/Loss Calculator
Calculate profit or loss on a crypto trade including fees
Market Cap Calculator
Calculate market capitalization and compare to target valuations
Fully Diluted Valuation Calculator
Calculate fully diluted valuation (FDV) and compare to market cap
Ecosystem
TX Social Pulse
Real-time social sentiment tracking for TX blockchain, Cosmos SDK, and XRPL bridge activity
TX Blockchain Guide
Guide to the TX Blockchain built on Cosmos SDK
Validator Comparison
Compare Cosmos SDK validators across networks
TX NFT Explorer
Explore NFTs on the TX Blockchain
Learn to Earn
Learn about crypto and blockchain to earn rewards
Ecosystem Map
Interactive map of the 508c1a crypto ecosystem
Directory Builder
Niche Analyzer
Analyze profitable niches for directory businesses
Data Pipeline
Design data pipelines for directory scraping and indexing
Cost Estimator
Estimate costs for building and running a directory
Monetization
Plan monetization strategies for your directory
Agent Profiles
Browse AI agent profiles and capabilities
Utility Tools
Accurate Time Clock
Atomic-precision time clock synced to global time servers
Trending Now
See what's trending across crypto, AI, and tech
JSON Formatter
Format, validate, and minify JSON data instantly in your browser
Base64 Tool
Encode and decode Base64 strings instantly in your browser
UUID Generator
Generate RFC 4122 compliant UUIDs (v4) instantly in your browser
JWT Decoder
Decode and inspect JWT tokens safely in your browser — no data leaves your device
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly in your browser
Color Converter
Convert colors between HEX, RGB, HSL, and OKLCH formats instantly
Markdown Preview
Write and preview Markdown with live rendering — no data leaves your browser
Cron Builder
Build and validate cron expressions with a visual editor — see next run times
API Status
Check if popular AI and crypto APIs are reachable — real-time status monitor
Token Counter
Estimate token counts for GPT-4, Claude, and other LLMs — plan your prompts and costs
Prompt Diff
Compare two prompts side by side and highlight differences — optimize your LLM prompts
Word Counter
Count words, characters, sentences, and estimate reading time instantly
Password Generator
Generate cryptographically secure random passwords in your browser — nothing leaves your device
Percentage Calculator
Calculate percentages, percentage change, and more — four modes in one tool
Age Calculator
Calculate your exact age in years, months, days, weeks, and hours from your date of birth
Coin Flip
Flip a fair coin with a cryptographically random result — heads or tails, with flip history
QR Code Generator
Generate QR codes for any URL or text instantly — download as PNG, all browser-based
Tip Calculator
Calculate tip amount and split the bill among your group — multiple tip presets
LLM Cost Estimator
Compare API costs across GPT-4o, Claude, Gemini, and more — find the cheapest model for your usage
Regex Tester
Test regular expressions with live match highlighting, group capture, and replacement preview
Compound Interest
Calculate compound interest with monthly contributions — year-by-year growth breakdown
Color & Design
Color Picker
Enter a hex color and get RGB, HSL, and OKLCH values instantly.
Gradient Generator
Generate CSS linear and radial gradients from two or more colors.
Contrast Checker
Check color contrast ratios for WCAG AA and AAA compliance.
Color Palette Generator
Generate complementary, analogous, triadic, and split-complementary palettes from any base color.
CSS Box Shadow Generator
Generate CSS box-shadow values with customizable offset, blur, spread, and color.
CSS Text Shadow Generator
Generate CSS text-shadow values for glow, outline, and depth effects.
CSS Border Radius Visualizer
Visualize and generate CSS border-radius values for all four corners.
CSS Gradient Text Generator
Generate CSS for gradient text (background-clip technique).
Color Blindness Simulator
Approximate how a color appears under different color vision deficiencies.
Color Mixer
Blend two colors together at a given ratio.
Shade & Tint Generator
Generate a scale of shades (darker) and tints (lighter) from any base color.
Tailwind Color Finder
Find the closest Tailwind CSS color class for any hex color.
CSS Color Name Finder
Find the closest named CSS color for any hex value.
Opacity Calculator
Calculate the resulting color when overlaying a semi-transparent color on a background.
Color Temperature Analyzer
Analyze whether a color is warm, cool, or neutral based on its hue.
Font Pairing Suggester
Get proven font pairing suggestions for headings and body text.
Type Scale Calculator
Generate a modular type scale based on a base size and ratio.
Spacing Scale Generator
Generate a consistent spacing scale for padding, margins, and gaps.
Icon Size Reference
Get recommended icon sizes for different contexts: UI, mobile, favicons, and app icons.
Design Token Generator
Generate a design token JSON file from your brand colors, fonts, and spacing.
Glass Effect CSS Generator
Generate CSS for glassmorphism effects with backdrop blur, transparency, and borders.
Neumorphism CSS Generator
Generate neumorphic (soft UI) CSS with light and dark shadows on a matching background.
Conversion
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin temperature scales
Weight Converter
Convert between kilograms, pounds, ounces, grams, and stone
Length Converter
Convert between meters, feet, inches, centimeters, millimeters, yards, miles, and kilometers
Speed Converter
Convert between mph, km/h, m/s, and knots
Area Converter
Convert between square feet, square meters, acres, and hectares
Volume Converter
Convert between liters, gallons, cups, tablespoons, teaspoons, milliliters, and fluid ounces
Data Size Converter
Convert between bytes, kilobytes, megabytes, gigabytes, terabytes, and petabytes
Pressure Converter
Convert between PSI, bar, atmospheres, Pascals, and mmHg
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and electron volts
Power Converter
Convert between watts, kilowatts, horsepower, and BTU/hr
Angle Converter
Convert between degrees, radians, and gradians
Time Converter
Convert between seconds, minutes, hours, days, weeks, months, and years
Cooking Measurement Converter
Convert between common cooking measurements like cups, tablespoons, teaspoons, and milliliters
Shoe Size Converter
Convert shoe sizes between US, EU, and UK sizing systems
Clothing Size Converter
Convert clothing sizes between letter sizes (S/M/L) and numeric sizing systems
Fuel Economy Converter
Convert between miles per gallon, liters per 100km, and kilometers per liter
Typography Converter
Convert between pixels, points, em, and rem for web typography
Resolution Converter
Convert between DPI and PPI resolution values and calculate print dimensions
Bandwidth Converter
Convert between Mbps, MBps, Gbps, and other bandwidth units
Frequency Converter
Convert between Hertz, kilohertz, megahertz, and gigahertz
Force Converter
Convert between Newtons, pound-force, kilogram-force, and dynes
Torque Converter
Convert between Newton-meters, foot-pounds, and kilogram-force meters
Flow Rate Converter
Convert between liters per minute, gallons per minute, and cubic meters per hour
Luminance Converter
Convert between candelas per square meter, nits, and lamberts
Voltage Converter
Convert between volts, millivolts, and kilovolts
Current Converter
Convert between amperes, milliamperes, and microamperes
Resistance Converter
Convert between ohms, kilohms, and megohms
Capacitance Converter
Convert between farads, microfarads, nanofarads, and picofarads
Inductance Converter
Convert between henries, millihenries, and microhenries
Magnetic Field Converter
Convert between Tesla, Gauss, and milliTesla magnetic field units
Radiation Dose Converter
Convert between Sieverts, milliSieverts, and rem radiation dose units
Sound Level Converter
Convert between decibel scales and calculate sound pressure levels
Density Converter
Convert between kg/m³, g/cm³, and lb/ft³ density units
Viscosity Converter
Convert between Pascal-seconds, centipoise, and poise viscosity units
Acceleration Converter
Convert between m/s², g-force, and ft/s² acceleration units
Number System Converter
Convert between decimal, binary, octal, and hexadecimal number systems
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals
Metric Prefix Converter
Convert between metric prefixes like nano, micro, milli, kilo, mega, and giga
Paper Size Converter
Look up and compare paper sizes including A4, Letter, Legal, and more
Screen Size Calculator
Calculate screen width and height from diagonal size and aspect ratio
Aspect Ratio Calculator
Calculate aspect ratio from width and height, or find missing dimension
Image Resolution Calculator
Calculate megapixels, file size estimates, and print dimensions from image resolution
Developer Tools
chmod Calculator
Calculate Unix file permissions from symbolic or numeric notation
Subnet Calculator
Calculate IP ranges, subnet masks, and host counts from CIDR notation
HTTP Status Code Reference
Quick reference for HTTP status codes with descriptions and use cases
cURL to Fetch Converter
Convert cURL commands to JavaScript fetch API calls
SQL Formatter
Format and prettify SQL queries with proper indentation
CSS Minifier
Minify CSS code by removing whitespace, comments, and unnecessary characters
HTML Minifier
Minify HTML by removing comments, extra whitespace, and optional attributes
JavaScript Minifier
Basic JavaScript minifier that removes comments and unnecessary whitespace
YAML to JSON Converter
Convert YAML markup to JSON format
JSON to YAML Converter
Convert JSON data to YAML format
XML to JSON Converter
Convert XML markup to JSON format
TOML to JSON Converter
Convert TOML configuration to JSON format
.env File Formatter
Format, sort, and validate .env environment variable files
Git Command Builder
Build common Git commands with a visual interface
Docker Run to Compose
Convert docker run commands to docker-compose.yml format
Nginx Config Generator
Generate Nginx server block configurations for common setups
Apache .htaccess Generator
Generate Apache .htaccess configuration files for common use cases
README Template Generator
Generate professional README.md templates for your projects
License Chooser
Choose and generate the right open source license for your project
Semantic Version Bumper
Bump semantic version numbers and compare versions
Package.json Generator
Generate a package.json file with common configurations
Tailwind Class Sorter
Sort Tailwind CSS classes in the recommended order
CSS Grid Generator
Generate CSS Grid layout code with visual configuration
CSS Flexbox Playground
Generate CSS Flexbox layout code with visual property selection
Box Shadow Generator
Generate CSS box-shadow values with a visual builder
Border Radius Generator
Generate CSS border-radius values with per-corner control
SVG Path Data Viewer
Visualize and inspect SVG path data commands
Favicon Maker
Create and download favicons in all standard sizes from text, drawing, or image upload
Favicon Generator
Generate SVG favicon markup from emoji or text characters
Meta Tag Generator
Generate HTML meta tags for SEO and social sharing
Open Graph Tag Generator
Generate Open Graph and Twitter Card meta tags for social sharing
robots.txt Generator
Generate robots.txt files to control search engine crawling
sitemap.xml Generator
Generate sitemap.xml files for search engine indexing
IP Address Info
Analyze and validate IP addresses with type detection
Port Number Reference
Look up common port numbers and their associated services
ASCII Table Reference
Look up ASCII character codes, decimal, hex, and binary values
Keyboard Code Finder
Find JavaScript key codes, key names, and event properties for keyboard events
Epoch/Date Converter
Convert between Unix epoch timestamps and human-readable dates
Byte Size Converter
Convert between bytes, KB, MB, GB, TB and other data size units
DNS Record Type Reference
Reference guide for DNS record types with examples and use cases
API Endpoint Builder
Build and format REST API endpoint URLs with query parameters
Webhook Tester URL Generator
Generate webhook test payload examples and endpoint documentation
Environment Variable Checker
Compare two .env files and find missing, added, or changed variables
Color Format Converter
Convert colors between HEX, RGB, HSL, and CSS formats
URL Encoder/Decoder
Encode or decode URL components and full URLs
HTML Entity Encoder
Encode and decode HTML entities for safe rendering
JWT Generator
Generate unsigned JWT tokens for testing and development
Lorem Ipsum Generator
Generate placeholder text for design and development
String Case Converter
Convert strings between camelCase, snake_case, kebab-case, PascalCase, and more
Markdown Table Generator
Generate Markdown table syntax from column and row definitions
CSP Header Generator
Generate Content Security Policy headers for web security
CORS Header Generator
Generate CORS response headers for API and server configurations
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal
Timestamp Formatter
Format dates into multiple common timestamp formats used in programming
Password Generator
Generate secure random passwords with customizable rules
JSON Path Finder
Find all paths to values in a JSON object for querying
Diff Checker
Compare two blocks of text and find differences line by line
Education
GPA Calculator
Calculate your GPA on a 4.0 scale from course grades and credit hours
Grade Calculator
Calculate your weighted average grade from assignments, exams, and participation
Study Timer
Plan pomodoro-style study sessions with customizable work and break intervals
Reading Speed Calculator
Calculate your reading speed in words per minute and estimate time to finish books
Flashcard Score Tracker
Track your flashcard study performance and calculate mastery percentage
Citation Generator
Generate basic APA or MLA citations for books, articles, and websites
Essay Word Count Target
Plan essay sections and track word count targets for each part
Exam Score Calculator
Calculate your exam score from correct answers, with optional bonus points
Class Grade Needed Calculator
Calculate what score you need on the final exam to reach your target grade
GPA to Letter Grade Converter
Convert between GPA values and letter grades on common grading scales
Credit Hours Calculator
Calculate total credit hours and expected weekly workload for your course load
Scholarship Amount Calculator
Calculate how much scholarships reduce your total education costs
Student Loan Payment Calculator
Estimate monthly student loan payments and total interest over the loan term
Study Hour Planner
Plan weekly study hours across subjects based on difficulty and credit weight
Typing Speed Calculator
Calculate your typing speed in WPM and accuracy from a typing test
Plagiarism Risk Checker
Estimate plagiarism risk by analyzing text originality metrics
Readability Score Calculator
Calculate Flesch-Kincaid readability scores from text statistics
Bibliography Entry Counter
Track and verify your bibliography meets minimum source requirements
Semester vs Cumulative GPA
Calculate how your semester GPA impacts your cumulative GPA
Test Percentile Calculator
Calculate your test percentile rank based on score distribution
Curve Grade Calculator
Apply common grading curves to adjust exam scores
Assignment Due Date Tracker
Calculate days remaining and daily work targets for upcoming assignments
Study Break Timer
Calculate optimal study-to-break ratios for sustained focus and retention
Finance
Loan Payment Calculator
Calculate monthly loan payments with full amortization breakdown
Mortgage Calculator
Calculate mortgage payments including taxes, insurance, and PMI
Salary to Hourly Converter
Convert annual salary to hourly, weekly, and monthly rates
Hourly to Salary Converter
Convert hourly wage to annual, monthly, and weekly salary
Savings Goal Calculator
Calculate how much to save monthly to reach your savings goal
Retirement Calculator
Estimate retirement savings and monthly income based on contributions
Tax Bracket Estimator
Estimate US federal income tax based on 2024 tax brackets
Inflation Calculator
Calculate the impact of inflation on purchasing power over time
Currency Converter
Convert between major world currencies using reference rates
Net Worth Calculator
Calculate your total net worth from assets and liabilities
Debt Payoff Calculator
Calculate how long to pay off debt and total interest paid
Emergency Fund Calculator
Calculate how much you need in your emergency fund
Down Payment Calculator
Calculate down payment amounts and savings timeline for home purchase
Rent vs Buy Calculator
Compare the total cost of renting versus buying a home over time
Break-Even Calculator
Calculate the break-even point for your business or product
Markup Calculator
Calculate selling price from cost and markup percentage
Margin Calculator
Calculate profit margin, cost, or selling price from any two values
Discount Calculator
Calculate discounted price and savings from original price
Sales Tax Calculator
Calculate sales tax amount and total price with tax included
Invoice Generator
Generate a text-based invoice summary with line items and totals
Paycheck Calculator
Estimate take-home pay after federal tax, FICA, and deductions
Overtime Calculator
Calculate overtime pay at 1.5x and 2x rates
401k Calculator
Calculate 401k growth with employer matching contributions
Roth IRA Calculator
Project Roth IRA growth with tax-free withdrawals in retirement
Stock Return Calculator
Calculate total return and annualized return on a stock investment
Dividend Yield Calculator
Calculate dividend yield and annual income from stock dividends
Price per Unit Calculator
Compare prices per unit to find the best deal
Cost of Living Comparison
Compare cost of living between two locations using a salary baseline
Car Loan Calculator
Calculate monthly car loan payments with trade-in and down payment
Lease vs Buy Calculator
Compare the total cost of leasing versus buying a vehicle
Credit Card Payoff Calculator
Calculate how long to pay off credit card debt and interest costs
APR vs APY Calculator
Convert between APR and APY and understand compounding effects
Rule of 72 Calculator
Estimate how long it takes to double your money at a given rate
Future Value Calculator
Calculate the future value of a lump sum or periodic investments
Present Value Calculator
Calculate the present value of a future sum of money
Annuity Calculator
Calculate annuity payments, present value, or future value
Debt-to-Income Ratio
Calculate your debt-to-income ratio used by lenders for approval
Gross Profit Margin
Calculate gross profit margin from revenue and cost of goods sold
Operating Margin Calculator
Calculate operating margin from revenue and operating expenses
FIRE Calculator
Calculate your path to Financial Independence and Early Retirement
Side Hustle Income Tracker
Track side hustle income, expenses, and calculate net profit and tax liability
Freelance Rate Calculator
Calculate your ideal freelance hourly rate based on target income and expenses
Health & Wellness
Calorie & TDEE Calculator
Calculate your Total Daily Energy Expenditure and daily calorie needs based on activity level.
Sleep Cycle Calculator
Find the best times to wake up or go to sleep based on 90-minute sleep cycles.
Water Intake Calculator
Calculate your recommended daily water intake based on weight, activity, and climate.
Ideal Weight Calculator
Calculate your ideal body weight using the Devine, Robinson, Miller, and Hamwi formulas.
Body Fat Percentage Estimator
Estimate your body fat percentage using the U.S. Navy method with neck, waist, and hip measurements.
Pregnancy Due Date Calculator
Estimate your pregnancy due date and trimester timeline based on your last menstrual period.
Heart Rate Zone Calculator
Calculate your heart rate training zones using the Karvonen method for optimal workouts.
Macro Calculator
Calculate your ideal daily macronutrient split (protein, carbs, fats) based on your goals.
Basal Metabolic Rate Calculator
Calculate your Basal Metabolic Rate using both Harris-Benedict and Mifflin-St Jeor equations.
Body Surface Area Calculator
Calculate your body surface area (BSA) using the Du Bois and Mosteller formulas.
Blood Alcohol Calculator
Estimate your blood alcohol concentration (BAC) using the Widmark formula.
Pace Calculator
Calculate running or walking pace, speed, and finish times for any distance.
VO2 Max Estimator
Estimate your VO2 Max (maximal oxygen uptake) from a running time trial or Cooper test.
One Rep Max Calculator
Calculate your estimated one-rep max (1RM) and training percentages using Epley, Brzycki, and Lombardi formulas.
Waist-to-Hip Ratio Calculator
Calculate your waist-to-hip ratio (WHR) and assess health risk for cardiovascular disease.
Daily Protein Needs Calculator
Calculate your optimal daily protein intake based on body weight, activity, and fitness goals.
Smoking Cost Calculator
Calculate the financial and health impact of smoking, and potential savings from quitting.
Caffeine Half-Life Calculator
Calculate how long caffeine stays in your system and its effect on sleep based on consumption time.
Ovulation Calculator
Estimate your ovulation date and fertile window based on your menstrual cycle.
Target Heart Rate Calculator
Calculate your target heart rate range for exercise based on age and fitness goals.
Blood Pressure Category Checker
Check your blood pressure category based on AHA guidelines and understand your readings.
Body Water Percentage Calculator
Estimate your total body water percentage based on age, gender, and weight using the Watson formula.
Steps to Distance Converter
Convert your step count into distance walked (km and miles) and estimate calories burned.
Sitting Time Calculator
Calculate your daily and weekly sitting time and understand health risks from sedentary behavior.
Screen Time Impact Calculator
Assess the health impact of your daily screen time and get recommendations for healthier habits.
Breathing Exercise Timer
Calculate breathing exercise patterns for box breathing, 4-7-8, and other relaxation techniques.
Fasting Timer & Tracker
Track intermittent fasting windows and calculate metabolic stages during your fast.
Hydration Level Checker
Assess your hydration status based on symptoms, water intake, and activity level.
Workout Calorie Burn Estimator
Estimate calories burned during various exercises using MET values and body weight.
Lean Body Mass Calculator
Calculate your lean body mass (fat-free mass) using the Boer, James, and Hume formulas.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birth.
Keto Macro Calculator
Calculate your ketogenic diet macros with precise fat, protein, and carb targets for ketosis.
Math & Science
Fraction Calculator
Add, subtract, multiply, or divide fractions and mixed numbers
Standard Deviation Calculator
Calculate standard deviation, variance, and other statistics for a data set
Mean / Median / Mode Calculator
Find the mean, median, mode, and range of a data set
Probability Calculator
Calculate probability of events including independent and complementary
Scientific Notation Converter
Convert between standard numbers and scientific notation
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal
Greatest Common Divisor
Find the greatest common divisor (GCD) of two or more numbers
Least Common Multiple
Find the least common multiple (LCM) of two or more numbers
Pythagorean Theorem Calculator
Calculate any side of a right triangle using the Pythagorean theorem
Quadratic Equation Solver
Solve quadratic equations (ax² + bx + c = 0) and find roots
Triangle Area Calculator
Calculate the area of a triangle using base/height or three sides (Heron's formula)
Circle Calculator
Calculate circle area, circumference, and diameter from radius
Sphere Calculator
Calculate sphere volume, surface area, and diameter from radius
Cylinder Calculator
Calculate cylinder volume, surface area, and lateral area
Prime Number Checker
Check if a number is prime and find its factors
Factorial Calculator
Calculate the factorial (n!) of a number
Fibonacci Sequence Generator
Generate the Fibonacci sequence up to n terms
Permutation Calculator
Calculate permutations P(n, r) - ordered arrangements
Combination Calculator
Calculate combinations C(n, r) - unordered selections
Matrix Determinant Calculator
Calculate the determinant of a 2x2 or 3x3 matrix
Logarithm Calculator
Calculate logarithms with any base (natural, common, or custom)
Exponent Calculator
Calculate powers and exponents (x raised to the power of y)
Square Root Calculator
Calculate square root, cube root, and nth root of a number
Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's Law
Speed / Distance / Time Calculator
Calculate speed, distance, or time given the other two values
Force Calculator (F=ma)
Calculate force, mass, or acceleration using Newton's second law
Kinetic Energy Calculator
Calculate kinetic energy, mass, or velocity using KE = ½mv²
Potential Energy Calculator
Calculate gravitational potential energy using PE = mgh
Density Calculator
Calculate density, mass, or volume using the density formula
Molar Mass Calculator
Calculate molar mass of chemical compounds from common elements
pH Calculator
Calculate pH, pOH, and ion concentrations from hydrogen ion concentration
Wavelength / Frequency Converter
Convert between wavelength, frequency, and energy of electromagnetic waves
Decibel Calculator
Calculate decibel levels, power ratios, and voltage ratios
Aspect Ratio Calculator
Calculate aspect ratio and resize dimensions proportionally
Golden Ratio Calculator
Calculate golden ratio proportions for design and mathematics
Roman Numeral Converter
Convert between Roman numerals and decimal numbers
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number
Trigonometry Calculator
Calculate sin, cos, tan and inverse trig functions
Privacy & Security
Privacy Policy Generator
Generate a basic privacy policy template for your website or app
Cookie Banner Text Generator
Generate compliant cookie consent banner text for your website
GDPR Compliance Checklist
Assess your website or app GDPR compliance with an interactive checklist
Data Breach Response Checklist
Generate a data breach response plan and notification checklist
Password Strength Checker
Check how strong your password is and get improvement suggestions
Email Privacy Checker
Check if an email uses a throwaway or temporary domain
Passphrase Generator
Generate memorable, secure passphrases from random words
CORS Header Generator
Generate Cross-Origin Resource Sharing (CORS) headers for your API
Content Security Policy Generator
Generate Content-Security-Policy headers to protect against XSS and injection attacks
Subresource Integrity Hash Generator
Generate SRI hashes for script and link tags to prevent tampering
Privacy Score Calculator
Calculate your personal online privacy score based on your habits
Data Retention Policy Generator
Generate a data retention policy with recommended timeframes by data type
Terms of Service Generator
Generate a basic Terms of Service template for your website or app
DSAR Template Generator
Generate Data Subject Access Request templates for GDPR compliance
Two-Factor Auth Setup Guide
Get a personalized 2FA setup guide for your accounts and preferred method
Encryption Key Generator
Generate cryptographically secure random hex keys for encryption
Secure Headers Checker
Check which security headers your site should have and generate them
Productivity
Pomodoro Timer Calculator
Calculate total work and break time for your Pomodoro sessions
Meeting Cost Calculator
Calculate the true cost of meetings based on attendees, hourly rates, and duration
Salary Negotiation Calculator
Compare salary offers with total compensation breakdown including benefits and taxes
Invoice Generator
Generate a text-based invoice with line items, tax, and totals
Time Tracking Calculator
Convert hours and minutes to decimal time and calculate pay for tracked periods
Billable Hours Calculator
Calculate billable amounts from tracked hours with overtime and discount options
Project Timeline Estimator
Estimate project completion dates with buffer time and team capacity
Task Priority Matrix
Categorize tasks using the Eisenhower Matrix based on urgency and importance
Daily Routine Planner
Plan your ideal daily routine and calculate time allocation across categories
Goal Progress Tracker
Track progress toward a goal and estimate completion date based on current pace
Habit Streak Calculator
Calculate habit consistency, streak milestones, and success rate over time
Email Response Time Calculator
Calculate average email response time and estimate inbox processing capacity
Commute Cost Calculator
Calculate the true annual cost of commuting including fuel, time, and wear
Work-Life Balance Score
Score your work-life balance across key dimensions of well-being
Productivity Score Calculator
Measure your productivity score based on task completion, focus time, and distractions
Sprint Velocity Calculator
Calculate average sprint velocity and predict future sprint capacity
Story Points Estimator
Estimate story points using complexity, uncertainty, and effort factors
Burn Rate Calculator
Calculate your startup's monthly burn rate and months of runway remaining
Runway Calculator
Calculate startup runway with revenue growth projections and funding scenarios
Break-Even Employee Calculator
Calculate when a new hire generates enough revenue to cover their total cost
Hiring Cost Calculator
Calculate the total cost of hiring a new employee including recruiting and onboarding
Employee Turnover Cost
Estimate the total cost of losing and replacing an employee
ROI Calculator
Calculate return on investment with annualized returns and payback period
Random & Fun
Random Name Picker
Pick a random name from a comma-separated list
Yes/No Generator
Get a random yes or no answer to help you decide
Magic 8-Ball
Ask the Magic 8-Ball and receive a mystical answer
Random Color Generator
Generate a random color with hex, RGB, and HSL values
Random Quote Generator
Get inspired with a random motivational or famous quote
Wheel of Fortune Spinner
Spin the wheel and land on a random choice from your list
Random Team Generator
Split a list of people into random teams
Random Date Generator
Generate a random date within a specified range
Random Number in Range
Generate a random integer between any two numbers
Would You Rather Generator
Get a random Would You Rather question for games and parties
Truth or Dare Generator
Get random truth questions or dare challenges for game night
Random Emoji Generator
Generate random emojis for fun or creative inspiration
Random Fact Generator
Learn something new with a random interesting fact
Rock Paper Scissors
Play Rock Paper Scissors against the computer
Random Meal Suggester
Get a random meal suggestion when you cannot decide what to eat
Random Workout Generator
Generate a random workout routine to keep things fresh
Decision Maker
Make weighted random decisions from a list of options
Baby Name Generator
Generate random baby name suggestions by gender and style
Band Name Generator
Generate random band name ideas for your next musical project
Superhero Name Generator
Generate a random superhero name and origin story
Story Prompt Generator
Generate random story prompts and writing inspiration
Random Hex Color
Generate random hex color codes for design and development
Lottery Number Generator
Generate random lottery numbers for various game formats
Bingo Card Generator
Generate a random 5x5 bingo card with a free center space
Random Countdown
Generate a random countdown duration for games and challenges
Fortune Cookie Generator
Crack open a virtual fortune cookie and read your fortune
Compliment Generator
Get a random compliment to brighten your day or share with a friend
SEO & Marketing
Meta Tag Generator
Generate HTML meta tags with a live search engine preview
Open Graph Preview
Preview and generate Open Graph meta tags for social sharing
Twitter Card Preview
Preview and generate Twitter/X Card meta tags
robots.txt Generator
Generate a robots.txt file for search engine crawlers
Sitemap XML Generator
Generate a sitemap.xml file from a list of URLs
Title Tag Length Checker
Check if your page title meets SEO length recommendations
Meta Description Length Checker
Validate your meta description length for optimal search display
Heading Tag Analyzer
Analyze heading tag hierarchy and count H1-H6 usage
Keyword Density Calculator
Calculate keyword frequency and density percentage in your content
URL Slug Generator
Convert text into clean, SEO-friendly URL slugs
Canonical URL Builder
Build canonical link tags to prevent duplicate content issues
Schema.org JSON-LD Generator
Generate Schema.org structured data in JSON-LD format
UTM Link Builder
Build campaign URLs with UTM tracking parameters
QR Code with UTM
Generate a QR code URL with built-in UTM campaign tracking
Email Subject Line Tester
Analyze email subject lines for length, spam triggers, and effectiveness
Call-to-Action Generator
Generate compelling call-to-action button text variations
Headline Analyzer
Analyze headlines for word count, power words, and emotional impact
A/B Test Duration Calculator
Calculate how long to run an A/B test for statistically significant results
Email Open Rate Calculator
Calculate email campaign open rate and benchmark against industry averages
Click-Through Rate Calculator
Calculate click-through rate for ads, emails, or search results
Cost Per Click Calculator
Calculate cost per click from total ad spend and clicks
Return on Ad Spend Calculator
Calculate return on ad spend (ROAS) from revenue and ad cost
Social Media Post Character Counter
Check character limits for posts across major social media platforms
Hashtag Counter
Count, extract, and validate hashtags for social media posts
Social Media
Trend Reels
Browse and download free AI-generated trend videos for YouTube Shorts, TikTok, and Instagram Reels
Twitter/X Character Counter
Count characters and check if your tweet fits the 280-character limit
Instagram Caption Length Checker
Check if your Instagram caption fits the 2,200-character limit and preview truncation
LinkedIn Post Length Checker
Check your LinkedIn post against the 3,000-character limit with readability tips
TikTok Bio Length Checker
Check if your TikTok bio fits the 80-character limit
YouTube Title Optimizer
Optimize your YouTube title for the 70-character visible limit and SEO
Hashtag Generator
Generate relevant hashtags from your keywords for any social media platform
Social Media Bio Generator
Generate a compelling social media bio from your details and profession
Engagement Rate Calculator
Calculate your social media engagement rate from likes, comments, shares, and followers
Best Time to Post Guide
Find the optimal posting times for each social media platform based on general data
Follower Growth Rate Calculator
Calculate your follower growth rate over a given period
Social Media ROI Calculator
Calculate the return on investment for your social media campaigns
Content Calendar Planner
Generate a weekly content posting schedule for your social media platforms
Video Duration Formatter
Convert video duration between mm:ss, seconds, and HH:mm:ss formats
Thumbnail Size Reference
Quick reference for video thumbnail dimensions across all platforms
Profile Picture Size Guide
Reference guide for profile picture dimensions across every major platform
Social Media Image Size Reference
Complete reference for image dimensions across all social media platforms and post types
Post Time Converter
Convert your posting time across timezones for global audience scheduling
Text & Writing
Case Converter
Convert text between uppercase, lowercase, title case, sentence case, camelCase, snake_case, and kebab-case.
Text Repeater
Repeat a string or block of text a specified number of times with an optional separator.
String Reverser
Reverse a string character by character.
HTML Entity Encoder/Decoder
Encode special characters to HTML entities or decode them back to plain text.
Text to Slug Converter
Convert any text into a clean, URL-friendly slug.
Remove Duplicate Lines
Remove duplicate lines from text, keeping only unique entries.
Sort Lines Tool
Sort lines of text alphabetically, numerically, by length, or in reverse.
Add Line Numbers
Add line numbers to each line of text with customizable formatting.
Find and Replace
Find and replace text with support for regular expressions and case sensitivity.
Character Frequency Counter
Count the frequency of each character in your text and display a breakdown.
Whitespace Remover
Remove or normalize whitespace: trim lines, collapse multiple spaces, remove blank lines.
Text Truncator
Truncate text to a specified number of characters or words, with a custom ellipsis.
Paragraph Counter
Count the number of paragraphs, sentences, and lines in your text.
Sentence Extractor
Extract individual sentences from a block of text, one per line.
Vowel/Consonant Counter
Count vowels, consonants, digits, and special characters in your text.
ROT13 Encoder/Decoder
Encode or decode text using the ROT13 substitution cipher.
Morse Code Converter
Convert text to Morse code or Morse code back to text.
NATO Phonetic Alphabet Converter
Convert text into the NATO phonetic alphabet (Alpha, Bravo, Charlie...).
Pig Latin Converter
Convert English text into Pig Latin and back again.
Title Case Converter
Convert text to proper title case following AP/Chicago style rules, keeping small words lowercase.
CSV to JSON Converter
Convert CSV data to JSON format, using the first row as headers.
JSON to CSV Converter
Convert a JSON array of objects into CSV format.
Text to Binary Converter
Convert text to its binary representation (8-bit ASCII).
Binary to Text Converter
Convert binary strings back into readable text.
Reverse Words
Reverse the order of words in your text while keeping each word intact.
Random String Generator
Generate random strings with customizable length, character sets, and quantity.
Text Hash Viewer
Generate SHA-256, SHA-1, and MD5-like hashes of your text input (client-side via Web Crypto API).
Markdown to Plain Text
Strip all Markdown formatting and return clean plain text.
Text Diff Checker
Compare two blocks of text line by line and highlight the differences.
Unicode Character Lookup
Get Unicode code points, hex values, and character details for any text.
Text Wrap/Unwrap
Wrap text at a specified column width, or unwrap to remove hard line breaks.
Quote Generator
Wrap each line of text in quotes, brackets, or custom delimiters for code and data formatting.
Time & Date
Days Between Dates
Calculate the exact number of days between any two dates
Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from any date
Timezone Converter
Convert time between different timezones worldwide
Countdown to Date
See how much time remains until a specific future date
Work Days Calculator
Calculate business days between dates, excluding weekends
Day of Week Calculator
Find out what day of the week any date falls on
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates
Week Number Calculator
Find the ISO week number for any given date
Leap Year Checker
Check if a year is a leap year and find nearby leap years
Time Duration Calculator
Calculate hours and minutes between two times
Date Difference in Weeks
Calculate the exact number of weeks between two dates
Business Days Until Date
Calculate business days remaining until a target date
Time Zone Difference
Calculate the hour offset between two timezones
Day of Year Calculator
Find out what day number of the year a date falls on (1-365/366)
Hours Until Calculator
Calculate the exact hours and minutes until a future date and time
Meeting Time Planner
Plan meeting times across multiple timezones
Epoch Converter
Convert epoch/Unix timestamps to readable dates and vice versa
Date Format Converter
Convert dates between different display formats (US, EU, ISO, etc.)
Quarter Calculator
Determine which fiscal or calendar quarter a date falls in
Fiscal Year Calculator
Determine the fiscal year and quarter based on a custom fiscal year start month
Moon Phase Calculator
Calculate the approximate moon phase for any given date
Sunrise/Sunset Estimator
Estimate sunrise and sunset times based on date and latitude
ISO Week Date Converter
Convert between calendar dates and ISO 8601 week dates
Julian Day Calculator
Calculate the Julian Day Number for any calendar date
Relative Time Calculator
Convert a date into relative time (e.g., '3 days ago', 'in 2 weeks')
Century & Millennium Calculator
Determine which century and millennium a year belongs to
Time to Decimal Converter
Convert time in hours and minutes to decimal hours and vice versa
Pay Period Calculator
Calculate pay period start/end dates based on frequency and anchor date