Developer Tools
Format, validate and convert code.
- 34 tools available
- Free to use
- Browser-based processing
All Developer Tools
34 ToolsJSON Formatter
Format and prettify JSON data.
JSON Validator
Validate JSON syntax.
Base64 Encoder/Decoder
Encode or decode Base64 strings.
URL Encoder/Decoder
Encode or decode URLs.
HTML Formatter
Basic HTML formatting.
CSS Minifier
Minify CSS code.
JavaScript Minifier
Minify JavaScript code (basic).
XML Formatter
Format and indent XML.
SQL Formatter
Basic SQL keyword capitalization and line breaks.
Hash Generator
Generate SHA-256 hash locally.
JWT Decoder
Decode JWT header and payload locally (no verification).
Color Converter
Convert between HEX, RGB and HSL.
HTML Minifier
Minify HTML code.
CSS Formatter
Format CSS code.
JavaScript Formatter
Basic JavaScript formatting.
Markdown Preview
Preview Markdown as HTML (basic).
User Agent Parser
Parse user agent string.
HTTP Status Code Reference
Look up HTTP status code meaning.
Random Number Generator
Generate random numbers.
Password Strength Checker
Check password strength locally.
JSON Minifier
Minify JSON.
XML Validator
Validate XML well-formedness.
UUID Generator
Generate UUIDs.
URL Encoder/Decoder
Encode or decode URL components.
Regex Tester
Test a regular expression.
Unix Timestamp Converter
Convert Unix timestamp to date and back.
QR Code Generator
Generate a QR code image (via public API).
HTTP Status Code Reference
Lookup HTTP status code meaning.
Markdown Editor
Preview Markdown as HTML (basic).
Online Code Editor
Browser-based IDE with Monaco Editor. Edit HTML, CSS, JavaScript with live preview.
JSON to CSV Converter
Convert JSON arrays into clean, spreadsheet-ready CSV files.
Password Generator
Create strong random passwords with a cryptographically secure generator.
Cron Expression Generator
Build and understand five-field cron schedules with a plain-language summary.
Color Contrast Checker
Check WCAG contrast ratios between text and background colours.