Generate UUIDs in versions 7, 4, 1 and 5, in bulk, in whatever format your code expects — or paste one in to see what version it is and when it was made.
Fresh UUID · v7
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Generate UUIDs
Pick a version and a format, then generate one or a thousand.
Up to 1,000 at a time.
Formatting changes the text only; the value is identical.
Handy for pasting straight into code or a query.
The same namespace and name always give the same UUID.
One UUID is produced for each line; the count above is ignored.
Inspect a UUID
Paste any UUID or GUID to see its version and, where it holds one, its timestamp.
All UUIDs are generated locally in your browser using its cryptographic random source. Nothing is sent to Flipper File.
Free UUID / GUID Generator
A UUID (universally unique identifier) is a 128-bit value written as 32 hexadecimal digits in five hyphenated groups. Microsoft calls the same thing a GUID. The current standard is RFC 9562, published in 2024, which replaced RFC 4122 and added versions 6, 7 and 8.
Which version should I use?
v7 is the one to reach for when the UUID is a database key. It starts with a millisecond timestamp, so new IDs sort after old ones. Random v4 keys land all over a B-tree index, forcing page splits; v7 keys append at the end, which keeps inserts fast and the index compact.
v4 is pure randomness, 122 bits of it. Use it when you don't want an ID to reveal when it was created. v5 is derived from a namespace and a name by hashing, so the same input always yields the same UUID — useful for stable IDs derived from URLs or domain names. v1 is time-based too, but its timestamp bits are shuffled so it doesn't sort by time; prefer v7 for new work.
Does a v7 UUID reveal information?
Yes — its creation time, to the millisecond. Paste one into the inspector above and you'll see it. That's harmless for most keys but worth knowing before putting v7 IDs in public URLs where creation time matters.
Can two UUIDs collide?
For v4, you'd need to generate around 2.7 quintillion before the chance of a single collision reached 50%. v7 also carries 74 random bits per millisecond, and this generator adds a counter so IDs made in the same millisecond still come out in order and distinct.
Is a UUID a secret?
No. A UUID identifies something; it doesn't protect it. Don't use one as a password, API key or session token.