RANDOM BY DESIGN. READY ON DEMAND.
Fresh ID.
Next move.
Generate a random UUID v4 in your browser and copy it with one click. For test data, prototypes and the next thing you’re building.
Your next identifier
128 BITS / V4One value at a time. Generate replaces this identifier.
36 characters. One ID.
32 hexadecimal digits, separated by four hyphens. Lowercase, ready to paste.
Random, not guaranteed.
Version 4 only. Collisions are possible; this tool cannot prove global uniqueness. UUIDs are identifiers, not passwords.
Just this tab.
No uploads, analytics or saved history. Clear or reload removes the current value. Copy sends it to your device clipboard.
QUICK REFERENCE
Know your ID.
Small tool.
Clear boundaries.
How do I generate and copy a UUID?
A UUID v4 is generated when the page opens. Choose Generate new to replace it, then Copy UUID to copy the displayed value. The field is read only but selectable. Clear value removes it; Generate new starts again.
Are UUIDs saved, uploaded or tied to my device?
No. Generated values stay in tab memory without accounts, analytics, uploads or persistent storage. This app uses secure browser randomness, not your personal data. Copy writes to your device clipboard only after you activate it; your operating system may retain that copied text.
Why might copying or generation fail?
Clipboard access depends on browser security and permissions. If copying fails, the UUID is selected: press Ctrl+C or Cmd+C, or use your mobile selection menu. For generation, use a current browser over HTTPS or localhost with secure randomness available. This app never falls back to Math.random.
Can I generate other versions or recover an old UUID?
This tool generates one lowercase UUID v4 at a time. Other versions, bulk generation, history and downloads are not included. Generate replaces the previous value; Clear or reload removes it. There is no undo. Random UUIDs have probabilistic uniqueness, not a guarantee.