Developer Tools
15 free online developer tools. No signup, no installation, works in your browser.
- JSON Formatter - Format, validate, and beautify JSON data with syntax highlighting.
- Base64 Encoder/Decoder - Encode and decode Base64 strings quickly and securely.
- URL Encoder/Decoder - Encode and decode URLs for safe transmission over the internet.
- API Testing Tool - Test REST APIs like Postman. Send HTTP requests, inspect responses, and debug APIs with support for all methods.
- UUID Generator - Generate unique identifiers (UUIDs) in various formats including v1, v4, and v5.
- Regex Tester - Test regular expressions in real-time with match highlighting and explanation.
- HTML Entity Encoder - Convert special characters to HTML entities and decode them back.
- Timestamp Converter - Convert Unix timestamps to human-readable dates and vice versa.
- User-Agent Parser - Decode browser information from user-agent strings including OS and device.
- HTTP Status Code Lookup - Look up HTTP status codes and get detailed explanations and usage.
- Cron Expression Generator - Visual cron schedule builder with expression validation and explanation.
- HTML Tag Remover - Strip HTML tags from text while preserving content structure.
- CSS Minifier - Compress CSS code to reduce file size and improve loading speed.
- HTML Minifier - Compress HTML markup while preserving functionality and structure.
- Markdown Previewer - Preview and edit Markdown with live rendering and syntax highlighting.