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Developer Tools
Practical tools for developers — format, validate, decode and debug faster.
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JSON Formatter
Format and validate JSON
Regex Tester
Test regular expressions live
Diff Checker
Compare two texts side by side
HTML Minifier
Minify HTML code
CSS Minifier
Minify CSS code
SQL Formatter
Format and beautify SQL queries
JWT Decoder
Decode and inspect JWT tokens
Cron Parser
Parse and explain cron expressions
Color Picker
Pick colors and get HEX, RGB, HSL values
Word Counter
Count words, characters and reading time
Character Counter
Count characters with platform limits
Slug Generator
Convert text to SEO-friendly URL slugs
OpenAI API Cost Calculator
Calculate OpenAI GPT-4 and GPT-4o API costs
Claude API Cost Calculator
Calculate Anthropic Claude API costs