Browse Categories
Text Tools
Word count, case converter, find & replace
Code Tools
JSON, HTML, CSS, JS formatters & validators
Image Tools
Resize, crop, convert, compress images
Math & Calculators
Age, date, percentage, unit converters
Crypto & Security
Passwords, hashing, encoding, UUIDs
Web & SEO
Meta tags, URL encoder, color picker
PDF Tools
Images to PDF, merge, split PDFs
Productivity
Pomodoro timer, notes, todo lists
AI Tools
Cost calculators, token counters, VRAM
Audio & Video
Compress, convert, edit audio & video
Design & Creative
Color tools, palettes, contrast checker
Data Tools
JSON, YAML, CSV converters & validators
Compress
ZIP extractors, text compression, ratios
Science & Reference
Periodic table, country info lookup
🔥 Most Popular Tools
JSON Formatter
PopularBeautify, minify, and validate JSON data instantly. Pretty-print with custom indentation.
Base64 Encoder/Decoder
PopularEncode and decode Base64 strings and files. Supports text and binary data conversion.
Password Generator
PopularGenerate cryptographically secure passwords with customizable length, symbols, and numbers.
Word & Character Counter
PopularCount words, characters, sentences, and paragraphs. Estimate reading and speaking time.
HTML Formatter
PopularBeautify and minify HTML code. Clean up messy markup with proper indentation.
Color Picker & Converter
PopularPick colors and convert between HEX, RGB, HSL formats. Copy CSS-ready values instantly.
Case Converter
PopularConvert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
Hash Generator
PopularGenerate MD5, SHA-1, SHA-256, SHA-512 hashes from text. Verify file integrity.
URL Encoder/Decoder
PopularEncode and decode URLs with percent-encoding. Handle special characters in URLs properly.
🔧 Developer Tools
View all →CSS Formatter
Beautify and minify CSS code. Organize properties and clean up stylesheets.
JavaScript Formatter
Beautify and minify JavaScript. Format messy JS code with proper indentation.
Regex Tester
Test regular expressions with real-time matching. Highlight captures and groups.
JWT Decoder
Decode and inspect JWT tokens. View header, payload, and signature details.
📐 Math & Calculators
View all →Age Calculator
Calculate exact age in years, months, days from date of birth.
Percentage Calculator
Calculate percentages, percentage change, and percentage of a number.
Unit Converter
Convert between units of length, weight, temperature, speed, and more.
BMI Calculator
Calculate Body Mass Index and see healthy weight ranges for your height.
🤖 AI Tools
View all →OpenAI Cost Calculator
Estimate API costs across OpenAI models using input/output tokens.
Claude Cost Calculator
Calculate Anthropic Claude API usage costs online with prompt caching.
Token Counter
Count tokens for any text across different AI models.
VRAM Calculator
Calculate GPU VRAM requirements for AI model inference and training.