Free Online Developer Tools
JSON formatter, Base64 encoder, regex tester, and 20+ more tools. No signup required. 100% client-side & privacy-first.
Formatters & Beautifiers
Format, beautify, and minify your code
JSON Formatter
Free online JSON formatter and validator. Paste your JSON, instantly format, validate, and beautify it. No signup required.
HTML Minifier
Free online HTML minifier. Remove whitespace, comments, and reduce file size. See size reduction percentage instantly.
SQL Formatter
Free online SQL formatter. Format and beautify SQL queries with support for MySQL, PostgreSQL, and SQLite dialects.
CSS Beautifier
Free online CSS beautifier and minifier. Format your CSS with configurable indentation or minify for production.
Converters
Convert between different data formats
YAML ↔ JSON
Free online YAML to JSON converter. Convert between YAML and JSON formats instantly. Bidirectional conversion.
CSV ↔ JSON
Free online CSV to JSON converter. Convert between CSV and JSON with configurable delimiters. Bidirectional conversion.
XML ↔ JSON
Free online XML to JSON converter. Convert between XML and JSON formats with attribute support. Bidirectional conversion.
Markdown Preview
Free online Markdown editor with live preview. Write Markdown and see rendered HTML in real-time. Split pane editor.
Encoders & Decoders
Encode and decode data in various formats
Generators
Generate passwords, UUIDs, lorem ipsum, and more
Password Generator
Free online password generator. Create strong, random passwords with configurable length and character sets. Strength meter included.
UUID Generator
Free online UUID generator. Generate UUID v4 and v7, bulk generate, and validate existing UUIDs. Cryptographically secure.
Lorem Ipsum
Free online Lorem Ipsum generator. Generate placeholder text by paragraphs, sentences, or words. Configurable count.
QR Code Generator
Free online QR code generator. Create QR codes from text or URLs. Download as PNG or SVG with custom colors.
CSS Gradient
Free online CSS gradient generator. Create beautiful linear and radial gradients visually. Copy CSS code instantly.
Color Palette
Free online color palette generator. Create harmonious color palettes with HEX, RGB, and HSL values. Multiple harmony types.
Validators
Validate data formats and schemas
Testers & Debuggers
Test regex patterns, decode tokens, and debug
Regex Tester
Free online regex tester with real-time match highlighting, capture groups, and flag toggles. Test your regular expressions instantly.
JWT Decoder
Free online JWT decoder. Decode JSON Web Tokens, inspect header and payload, check expiration. No signup required.
Cron Parser
Free online cron expression parser. Get human-readable descriptions and next run times for any cron schedule.