UUID Generator
The UUID Generator creates cryptographically-random version-4 UUIDs (RFC 4122) — the universally-unique identifiers used for database keys, API tokens, and record IDs. Generate up to 100 at once, toggle hyphens and uppercase, and copy any one or the whole batch. Because each ID is generated independently from random bits rather than a shared counter, UUIDs let multiple servers or services mint unique identifiers at the same time without checking in with a central database. Keep in mind version-4 UUIDs are randomly ordered, not sequential — if you need IDs that also sort chronologically, look at newer schemes like UUID v7 instead.
Generates cryptographically-random version-4 UUIDs (RFC 4122) right in your browser — nothing is sent to a server, so every ID stays private. Up to 100 at a time.
How This Tool Works
Choose how many UUIDs you want and whether to include hyphens or uppercase letters, then press Generate. Copy any single UUID or the whole list with one click.
Formula & Method
A version-4 UUID is 122 random bits (with 6 fixed version/variant bits) shown as 32 hexadecimal digits in the pattern 8-4-4-4-12. The randomness comes from your browser’s cryptographic random number generator.
Example Calculation
Press Generate with a count of 5 to get five unique IDs like “3f2a9c14-8b7e-4d5a-9f10-2c6b1e8a4d33”, ready to paste into your database or code. Seeding a test database with 20 fake user records? Set the count to 20 and copy the whole batch at once, one UUID per line, straight into your seed script.
Frequently Asked Questions
What version of UUID is this?+
Version 4 — the random variant defined in RFC 4122. It’s the most common choice for database keys and API identifiers.
Are these UUIDs truly unique?+
Version-4 UUIDs have 122 random bits, so the odds of a collision are astronomically small — for practical purposes they’re unique.
Are the UUIDs generated privately?+
Yes — they’re created locally with your browser’s crypto API and never sent anywhere, so they’re safe to use as secrets or keys.
What’s the difference between a UUID and a GUID?+
They’re the same thing under different names — GUID (Globally Unique Identifier) is Microsoft’s term for the same 128-bit format standardized as UUID in RFC 4122. Any UUID generated here works equally well as a GUID.
Can two UUIDs generated here ever collide?+
In theory yes, in practice no — a version-4 UUID has 122 random bits, giving about 5.3 × 10³⁶ possible values. You'd need to generate roughly a billion UUIDs every second for about 85 years before there's even a 50% chance of a single collision anywhere in that set.
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<a href="https://everyfix.net/tools/uuid-generator/">UUID Generator</a> by <a href="https://everyfix.net">EveryFix</a>Related Tools
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