8 browser-based utilities
Free Developer Tools Online
Use browser developer tools to format JSON, build regex and cron expressions, convert timestamps and colors, encode Base64, and generate UUIDs without installs.
Regex Generator
Describe a matching rule and get a usable regular expression.
JSON Formatter
Format, minify, validate, and inspect JSON instantly.
UUID + Password
Generate secure UUIDs and strong passwords in your browser.
Markdown to HTML
Turn lightweight Markdown into clean, copy-ready HTML.
Cron Builder
Build a cron expression and see its schedule in plain English.
Base64 Converter
Encode text to Base64 or decode Base64 to readable UTF-8 text.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and dates back to seconds.
Color Converter
Convert HEX colors to RGB and HSL with a live color preview.