JSON Formatter & Validator
Format, validate, and minify JSON with error details, key sorting, and copy-ready output.
Browser-first · No sign-up
UUID Generator
Generate UUIDs (v4) and validate format locally.
No uploads. Everything runs locally in your browser.
How many (1-50)
Generated UUIDs will appear here.
Validate UUID
Valid UUID
How to use UUID Generator
- Choose how many.
- Generate UUIDs.
- Copy the ones you need.
Key features of UUID Generator
- Uses crypto.randomUUID().
- Generate up to 50 at once.
- Validate any UUID string.
UUID Generator — key benefits
- Completely free with no signup or registration required.
- Runs entirely in your browser — your data is never uploaded.
- Works on desktop, tablet, and mobile devices.
- Instant results with no waiting or processing queues.
- Part of the ToolCircuit suite of free online developer tools tools.
FAQ
Is it secure?
Generation uses the browser crypto API; nothing sent to a server.