Developer Tools
Free online developer tools to format JSON, encode Base64, generate UUIDs and test regular expressions. Fast, private and built for daily coding workflows.
4 free tools
JSON Formatter
Format, beautify, validate and minify JSON online for free. Spot errors instantly with line numbers. No upload — JSON is processed in your browser.
Open tool →Base64 Encoder
Encode and decode Base64 online for free. Handles UTF-8 text safely. No upload — all conversion runs in your browser for full privacy.
Open tool →UUID Generator
Generate UUID v4 online for free. Create one or thousands of unique IDs at once. No upload — UUIDs are generated in your browser.
Open tool →Regex Tester
Test regular expressions online for free. See matches highlighted live with capture groups and flags. No upload — runs entirely in your browser.
Open tool →