UUID Generator
Free UUID v4 generator — generate one or many cryptographically-random UUIDs with one click. Copy individually or all at once.
UUID Generator is a free online developer tool from FastDailyTools (Generate UUID v4 identifiers.). Free UUID v4 generator — generate one or many cryptographically-random UUIDs with one click. Copy individually or all at once. It runs entirely in your browser — no sign-up, no account, no email and no upload — and every result can be exported as a dated PDF report.
- ✔ Price: free, unlimited use, no rate limits
- ✔ Sign-up: not required
- ✔ Privacy: all math runs client-side, nothing is uploaded
- ✔ Export: one-click PDF report (2026 rates)
- 5253b23e-b3d7-4adb-90d0-3c6bfd6d3fd2
- aa88be11-96a9-4659-884b-54049407bfbc
- d31ccc7d-bd71-4c3a-9752-4f8deea53363
- 3974de9f-b3e8-4a24-a7e2-45df72460af1
- efb7fdb1-af19-4ae8-83ad-6862216ce92e
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How to use UUID Generator
- Choose how many UUIDs to generate.
- Click Generate.
- Copy one or all.
Frequently asked questions
Are these UUIDs unique?
UUID v4 uses 122 bits of randomness — collisions are astronomically unlikely (safer than winning the lottery every day for years).
Are these UUIDs cryptographically secure?
Yes — they use the browser's crypto.getRandomValues() API.