All Tools

24 free tools. No account required.

Math

Percentage Calculator

Find X% of Y, what percent X is of Y, or percentage change.

Date & Time

Age Calculator

Calculate your exact age in years, months, and days.

Military Time Converter

Convert between military time and standard 12-hour time.

Health

TDEE Calculator

Calculate your daily calorie needs with the Mifflin-St Jeor formula.

Converters

Celsius ↔ Fahrenheit

Convert between Celsius and Fahrenheit instantly.

MM ↔ Inches

Convert millimeters to inches and back.

KG ↔ LBS

Convert kilograms to pounds and back.

Developer Tools

JSON Formatter

Format, beautify, and validate JSON instantly.

UUID Generator

Generate random UUID v4 values, single or bulk.

Base64 Encode / Decode

Encode text to Base64 or decode Base64 to plain text.

Color Picker

Pick a color and convert between HEX, RGB, and HSL.

JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and expiration.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes instantly.

URL Encoder / Decoder

Encode or decode URLs and query string parameters instantly.

SQL Formatter

Format, beautify, and minify SQL queries instantly.

Cron Expression Builder

Build, parse, and test cron expressions with a visual editor.

Unix Timestamp Converter

Convert Unix timestamps to dates and dates to timestamps.

Chmod Calculator

Calculate Linux file permissions in numeric and symbolic notation.

YAML to JSON Converter

Convert between YAML and JSON formats instantly.

QR Code Generator

Generate QR codes for URLs, text, and more. Customize colors and download.

Case Converter

Convert text between camelCase, snake_case, PascalCase, kebab-case, and more.

JSON to CSV Converter

Convert JSON to CSV and CSV to JSON with custom delimiters.

YAML Formatter

Format, beautify, validate, and minify YAML instantly.

HTML Formatter

Format, beautify, and minify HTML with proper indentation.