Free Online Developer Tools

All tools run entirely in your browser. No server, no uploads, no tracking. Free forever.

Encoding & Decoding
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Base64 Decoder & Encoder
Decode Base64 to text or encode text to Base64. Supports files and UTF-8.
Live
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URL Encoder & Decoder
Percent-encode URLs and decode encoded strings. Handles all special characters.
Live
Formatters & Validators
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JSON Formatter
Format, validate and minify JSON. Syntax highlighting and error detection.
Live
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HTML Formatter
Beautify and minify HTML code with proper indentation.
Live
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CSS Minifier
Minify and format CSS. Remove comments, shorten colors, optimize zeros.
Live
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SQL Formatter
Format SQL for MySQL, PostgreSQL, SQLite, SQL Server and 10 more dialects.
Live
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YAML Formatter
Format, validate and convert YAML. Kubernetes, Docker, GitHub Actions config files.
Live
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SQL Formatter
Format SQL for MySQL, PostgreSQL, SQLite, SQL Server and 10 more dialects.
Live
Design & Colors
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Color Picker
Pick any color. Get HEX, RGB, HSL values instantly. Convert between formats.
Live
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Color Palette Generator
Complementary, analogous, triadic palettes. Export CSS, SCSS, JSON, Tailwind.
Live
Minifiers
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HTML Minifier
Remove whitespace and comments from HTML.
Coming Soon
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CSS Minifier
Compress CSS files for production.
Coming Soon
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JavaScript Minifier
Minify JavaScript code to reduce file size.
Coming Soon
Converters
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Epoch Converter
Convert Unix timestamps to dates. Seconds, milliseconds, ISO 8601, relative time.
Live
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Hash Generator
MD5, SHA-1, SHA-256, SHA-512, HMAC. Hash text or files. Compare hashes.
Live