Knowledge Center
Deep-dive guides and educational articles for every tool
540 toolsFinance & Trading
401(k) Calculator
Black-Scholes
Break-Even
CAGR Calc.
Capital Gains Tax Calculator
CD Ladder
Coast FIRE Calculator
Compound Interest
Crypto Profit
Currency Exchange Calculator
DCA Calculator
Depreciation
Discount Calculator
Drawdown
Expected Value
Fibonacci Retracement
FIRE
FIRE Withdrawal Simulator
Future Value Calc.
GST/VAT
Inflation
Real Return
Investment Fees
Invoice Due Date
Kelly Criterion
Lean vs Fat FIRE Calculator
Lease vs Buy
Lottery Odds
Margin
Markup
Options Greeks
Options P/L
Parlay Calculator
Percentage Calculator
Percentage Change
Pip Value
Position Size
Present Value Calc.
Profit Margin
Retirement Age
Retirement
Risk/Reward
RMD Calculator
ROI
Rule of 72
Commission Calculator
Savings Goal
Savings Rate FIRE Calculator
Sports Bet Calc
Runway Calculator
Stock Average
Stock Return Calc.
Stock Split Calc.
Tax-Equiv. Yield
Personal & Lifestyle
Amortization Schedule
Bandwidth Calculator
Billable Hours
BMI Calculator
BMI Prime
Body Fat Calculator
BSA Calculator
Car Loan Calculator
Carbon Footprint
Credit Card Payoff
Steps Calculator
Water Intake Calculator
Debt Payoff
Debt Snowball Calculator
Debt-to-Income
Dog Age
Down Payment
Emergency Fund
Estate Tax Calculator
Freelance Rate
Fuel Cost
Gas Mileage
GPA Calculator
Grade Calculator
HR Zone Calculator
Home Equity
Home Insurance
Hourly Rate Calculator
Hourly to Salary Calc.
Ideal Weight
Loan Amortization
Loan Comparison
Macros Calculator
Mortgage Affordability
Mortgage Calculator
Mortgage Points
Moving Checklist
Net Worth Calc.
1RM Calculator
Packing List
Paycheck
Payroll Tax
Pet Age
Pizza Calculator
Protein Calculator
Pace Calculator
Salary Converter
Sales Tax
Self-Employment Tax Calculator
Social Security
Student Loan
Tax Bracket Calculator
TDEE Calculator
Tip Split
Tip Calculator
Tip Etiquette
Travel Budget
Typing Speed Test
Unit Price
WHR Calculator
Wedding Budget
Weighted GPA
WiFi Signal
Work Hours Calculator
生成ツール
Acronym Generator
Anagram Solver
ASCII Art
Baby Names
Name Meanings
Band Names
BPM & Tempo Calculator
Citation Generator
Device Mockup
Dice Roller
Drum Pattern Maker
Duplicate Line Remover
Email Signature
Emoji Picker
Emoji Search
Excuse Generator
Fake Names
Fancy Text
Favicon
Flashcard Generator
Haiku Checker
Hash Generator
Invoice Generator
Lorem Ipsum
Mock Data
Music Key & Scale Reference
Palindrome Checker
Passphrase Generator
Password Entropy
Password Generator
Password Strength
Placeholder Image
QR Code Generator
Random Numbers
Resume Builder
SHA-256 Hash
Slug Generator
SQL Builder
Startup Names
Text to Handwriting
Text to Slug
Username Generator
UUID Generator
WiFi Names
WiFi QR Code
Would You Rather
Writing Prompts
Zalgo Text
Unit Converters
Angle Converter
Area Converter
Aspect Ratio
Aspect Ratio Lock
Blood Sugar Converter
Clothing Size Converter
Color Temperature
Cooking Converter
CSS Units Converter
Currency Converter
Data Storage Converter
Density Converter
Depth of Field Calculator
Distance
Electric Current Converter
Energy Converter
Energy Converter
Rx Converter
Flow Rate Converter
Font Size
Force Converter
Frequency Converter
Fuel Economy Converter
Illuminance Converter
Image Dimensions
Image Resizer
Kids Shoe Size by Age
Length Converter
Odds Converter
Oven Temp Converter
Paper Sizes
Photography Exposure Calculator
Power Converter
Pressure Converter
PX to REM
Recipe Scaler
Ring Size Converter
Scientific Notation
Screen PPI
Screen Size
Shoe Size Converter
Speed Converter
Storage Capacity
TW Spacing
Temperature Converter
Time Converter
Tire Size
Torque Converter
Volume Converter
Weight Converter
Wire Gauge
CSS & Design
Color Blindness
Color Code Converter
Contrast Checker
Gradient Stops
Color Harmony
Color Mixer
Color Name
Color Palette
Color Picker
Color Psychology
Color Shades
Color Space Converter
CSS Animation
Backdrop Filter
Border Radius
Box Shadow
Button Generator
Clip Path
CSS Filters
Flexbox Generator
CSS Gradient
Grid Areas
Grid Generator
Media Queries
Scrollbar CSS
Text Shadow
CSS Transform
Whiteboard
Flexbox
Font Pairing
Glassmorphism
Gradient Text
Hex to RGB
HTML Color Names
Pixel Art
Fluid Typography
Spacing Scale
SVG Path
SVG Wave
Tailwind Colors
Type Scale
Video Frame
開発者ツール
API Formatter
Base64 Encoder
CSS Minifier
CSV Column Extractor
CSV to JSON
cURL to Code
Data URL Generator
HTML Entity Encoder
HTML Minifier
HTML to JSX
HTML to Markdown
HTTP Header Analyzer
HTTP Status Codes
Image to Base64
Regex Cheat Sheet
Invisible Char Detector
JSON Diff
JSON Formatter
JSON Minifier
JSON Path Finder
JSON Schema
JSON to CSV
JSON to TypeScript
JSON to YAML
JSON Tree Viewer
JWT Debugger
JWT Generator
Keyboard Shortcuts
Line Sorter
Markdown Editor
Markdown Link Extractor
Markdown to HTML
Mermaid Editor
MIME Lookup
Port Reference
Regex Generator
Password Regex
Regex Tester
SQL Formatter
SQL to NoSQL
String Escape
Text Diff
Text Repeater
Text Replacer
Text Reverser
URL Encoder
UA Parser
Whitespace Cleaner
XML to JSON
YAML to JSON
Math & Statistics
Matrix Calculator
Acceleration
Area & Perimeter Calculator
Card Probability
Circuit Resistance
Complex Number Calculator
Coulomb's Law
Dice Probability
Fraction Calculator
Free Fall
Friction
GCD & LCM Calculator
Golden Ratio
Half-Life Calculator
Ideal Gas Law
Kinetic Energy
LED Resistor Calculator
Logarithm Calculator
Matrix Determinant
Molarity Calculator
Number Base Converter
Number Sequence Calculator
Ohm's Law
Pendulum
Periodic Table
Permutation & Combination
Polynomial Roots Calculator
Prime Factorization
Projectile Motion
Proportion Solver
Quadratic Solver
Ratio Calculator
Scientific Calculator
Sig Figs Calculator
Snell's Law
Standard Deviation
Statistics Calculator
Systems of Equations Solver
Lens Equation
Triangle Solver
Trigonometry Calculator
Vector Calculator
Voltage Divider Calculator
Wave Calculator
Encoding & Utilities
Accent Character Picker
ASCII Table
Barcode Decoder
Binary Calculator
Binary to Text
Case Converter
Chmod Calculator
Country Codes
Card Validator
Cron Builder
Cron to Human
Crontab Editor
Crontab Validator
IBAN Validator
Speed Guide
IP Analyzer
IP Subnet Calculator
ISBN Validator
Morse Code
NATO Phonetic
Number Base Converter
Number to Words
Phone Formatter
Pig Latin
Roman Numerals
Text to Binary
Text to NATO
Timestamp Converter
Timestamp to Date
Unicode Lookup
Unix Timestamp
VIN Decoder
SEO & Marketing
A/B Test Calculator
Canonical URL Checker
Character Counter
Cost per Click Calc.
Email HTML Validator
Subject Line Analyzer
Essay Word Counter
FAQ Schema
Favicon Checker
SERP Preview
Heading Checker
Hreflang Generator
JSON-LD Schema
Keyword Density
Link Analyzer
Meta Description Counter
Meta Robots
Meta Tags
OG Image
OG Meta Generator
OG Validator
Speed Checklist
Readability Score
Reading Time
Redirect Checker
Robots.txt
Sentence Counter
Character Counter
Social Sizes
Post Preview
Structured Data
Syllable Counter
Text Statistics
Text Stats
UTM Builder
Word Counter
Word Frequency Counter
Sitemap Generator
Sitemap Validator
YT Preview
Config & Docs
Gitignore Generator
htaccess Generator
API Builder
Changelog
CORS Generator
CSP Generator
Docker Compose
Dockerfile
English Grammar Reference
English Verb Conjugator
Env File Generator
French Verb Conjugator
README Generator
HTML Table
htpasswd Generator
Icon Sizes
IPA Phonetic Chart
JSON to Form
Markdown Resume
MD Table Generator
Nginx Config
Privacy Policy
Spanish Verb Conjugator
Terms of Service
Text to SSML
Home & Materials
Health & Wellness
Alcohol Units
Allergy Season Checker
Baby Growth Calculator
BAC Calculator
BP Checker
Blood Type
Caffeine Lookup
Caffeine Calculator
Calorie Calculator
Exercise Calories
Hearing Age
Meat Temperature
Cycle Calculator
Noise Calculator
Due Date Calculator
Pregnancy Weight Gain
Sleep Calculator
Vitamin D Calculator
VO2 Max Estimator
Time & Date
Divination
Astrology & Zodiac