UUID Generator
Free UUID v4 generator — generate one or many cryptographically-random UUIDs with one click. Copy individually or all at once.
Short answer: UUID Generator — 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 answers “bulk uuid v4 generator uppercase lowercase”. Who it is for: Developers needing unique IDs for records, tests or keys; Anyone generating a batch of IDs for a database import; Testers creating dummy data. 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)
- 0f494517-b448-4a6c-8f7f-f5beef2deac8
- 98507194-8e67-4b9b-8a2d-257340dae718
- d4c77317-3a30-4e61-9d85-9c12cd4b0b61
- 75c784ab-1eca-46dc-8fce-18ca675b4d6b
- 2f90ca5a-0e4c-41ee-942b-26f127f39967
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Who is this tool for?
- ✔ Developers needing unique IDs for records, tests or keys
- ✔ Anyone generating a batch of IDs for a database import
- ✔ Testers creating dummy data
- ✔ Students learning what a UUID is
- ✔ Anyone who needs a random ID without signing up
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.
Who is this UUID generator for?
Developers who need unique IDs for records, tests or keys, and anyone generating a batch of IDs for a database import.
Are these UUIDs guaranteed unique?
UUID v4 values are random 128-bit values, so a collision is practically impossible for normal use, but they are not sequential and not secret — do not use them as passwords or security tokens.
What formats can I copy?
One UUID or a batch, in uppercase, lowercase or wrapped in braces, using your browser's crypto API so the randomness is not a weak pseudo-random guess.
Bulk uuid v4 generator uppercase lowercase?
Use the UUID Generator above: Generate UUID v4 identifiers. Free UUID v4 generator — generate one or many cryptographically-random UUIDs with one click. Copy individually or all at once.