UUID Generator
Generate RFC 4122 v4 UUIDs instantly with one-click copy controls, hyphen/casing toggles, and a recent history tray.
Hash & HMAC GeneratorSlugifyPassword Generator
Focus on shipping. Let our instant tools handle the tedious stuff.
Gearizen brings together the utilities you reach for every day—UUID generation, JSON formatting, password hardening, color conversion, and more—all running securely in your browser.
Work without friction
All tools run instantly in your browser—no sign-up, no ads, no waiting for a backend round trip.
Ship with confidence
Consistent UI, copy buttons with clear feedback, and mobile-friendly layouts keep your workflow fast on any device.
Cover every everyday task
From UUIDs and password generation to JSON formatting and color conversions, Gearizen has your bases covered.
Featured tools ready for action
Start with our most popular utilities or dive into the full directory. Each tool works locally, so sensitive data never leaves your machine.
JSON Formatter
Validate, pretty-print, and minify JSON (with comments) locally. Nothing leaves your browser.
CSV to JSONJSON to CSVRegex Tester
Password Generator
Create crypto-strong passwords or passphrases. Unambiguous set, length and symbols are configurable.
Hash & HMAC GeneratorUUID GeneratorJWT Decoder
Color Converter
Convert HEX/RGB/HSL with alpha support, preview, and CSS-ready outputs.
Markdown PreviewCase ConverterQR Code Generator
Need something else?
Browse the complete Gearizen catalog or jump straight into search to uncover converters, formatters, encoders, and generators purpose-built for everyday developer workflows.