UUID Generator
Bulk-generate v4 and v7 UUIDs, ULIDs and nano IDs.
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About the UUID Generator
Generate identifiers in bulk. The Toolcenter UUID Generator produces UUID v4 (random), UUID v7 (time-ordered), ULIDs and Nano IDs, up to 100 at a time, using your device’s cryptographic random source. UUIDs can be uppercased or wrapped in braces, and the whole list is copyable or downloadable.
How to use it
- 1Choose UUID v4, v7, ULID or Nano ID.
- 2Set how many to generate.
- 3Toggle uppercase or braces for UUIDs.
- 4Copy the list or download it as a text file.
Key features
- UUID v4, UUID v7, ULID and Nano ID
- Generate up to 100 at once
- Cryptographically secure randomness
- Uppercase and brace formatting
- Copy-all and download
Frequently asked questions
What is the difference between UUID v4 and v7?+
v4 is fully random. v7 embeds a millisecond timestamp at the start, so v7 IDs sort chronologically — useful as database keys.
Are these UUIDs safe to use as primary keys?+
Yes. They are generated with crypto-strength randomness, so collision risk is negligible.
What is a ULID?+
A 26-character, Crockford base-32, lexicographically sortable identifier that also encodes a timestamp.
Is anything sent to a server?+
No. Generation is entirely local.
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