Developer Tools
JSON, Base64, HTML, URL, JWT and more tools for developers
Tools
29
Popular
14
New
21
Developer Tools
JSON Formatter
Format, beautify & validate JSON instantly
JSON Minify
Strip whitespace from JSON to reduce file size
Base64 Encode / Decode
Encode and decode Base64 strings instantly
HTML Viewer
Preview HTML code in real-time in your browser
HTML Formatter
Beautify and indent HTML code automatically
URL Encoder / Decoder
Encode and decode URL components instantly
JWT Decoder
Decode and inspect JWT tokens instantly
Regex Tester
Test and debug regular expressions live
Password Generator
Generate strong, random passwords instantly
UUID Generator
Generate RFC 4122 compliant UUID v4 values
HTML Entity Encoder
Encode & decode HTML entities instantly
CSS Minifier
Minify CSS to reduce file size instantly
JS Minifier
Minify JavaScript by removing comments & whitespace
Color Picker & Palette Generator
Pick a color, generate scales, and copy design-ready values
Markdown Previewer
Write Markdown on the left and preview it live on the right
Code Formatter
Format HTML, CSS, and JavaScript from one workspace
Data Format Converter
Convert JSON, YAML, XML, and CSV in one browser workspace
JSON Diff Checker
Compare two JSON payloads after formatting normalization
Hash Generator
Generate SHA hashes in the browser for quick verification
HMAC Generator
Generate keyed HMAC signatures for API authentication flows
cURL ↔ Fetch Converter
Convert API request snippets between cURL and fetch
Query Params Parser
Parse query strings into JSON and build them back again
WCAG Contrast Checker
Test text and background colors for accessibility compliance
CSS Gradient Generator
Create layered gradients and copy production-ready CSS
Package.json Explorer
Inspect scripts, dependencies, and install commands instantly
CI Matrix Generator
Build GitHub Actions job matrices for Node, OS, and package managers
AI Chat Workbench
Chat with LemonfoxAI for drafts, explanations, and technical help
Speech to Text
Transcribe audio files and public audio URLs with AI
Text to Speech
Turn text into downloadable AI voice output