Online Developer Toolbox

A fast, private-first collection of tools for developers

JSON Formatter
Format, validate and edit JSON data with syntax highlighting and error location
Image Compressor
Compress JPEG, PNG and WebP images locally in your browser, no upload needed
Base64 / URL Codec
Quickly encode and decode text or files using Base64 and URL encoding
Timestamp Converter
Convert between Unix timestamps and human-readable dates in UTC and local time
Regex Tester
Test regular expressions in real time with AI-assisted pattern generation
Markdown Preview
Live preview Markdown rendering with syntax highlighting and split-pane view
UUID Generator
Generate UUID v4 in bulk with multiple format options
Hash Generator
Calculate SHA-1, SHA-256, and SHA-512 hashes for text or files
Text Diff
Compare two texts and highlight differences at line, word or char level
Color Converter
Convert between HEX, RGB, and HSL color formats