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UUID generator
Generate RFC 9562 UUID v4 or v7 values in batches, with uppercase output, individual copying and text download.
About this tool
Create identifiers for records and test data, choosing whether time information belongs in the value. Copy or download the batch before leaving the page.
How to use
Choose v4 or v7, set the quantity and letter case, and the results appear immediately. Generate again for a fresh batch, copy individual values or download the whole list.
Uses cryptographically secure browser randomness, up to 1,000 UUIDs per batch. UUID v7 includes a millisecond timestamp; values generated within the same millisecond are not guaranteed to increase monotonically. Identifiers are not substitutes for passwords or access tokens.
Common questions
When should I choose UUID v4 or v7?
v4 is a random identifier. v7 begins with a millisecond timestamp for approximate chronological ordering, but values within one millisecond are not guaranteed to increase. Neither replaces a password or access token.
How do I keep a batch of identifiers?
Set a quantity from 1 to 1,000, then copy individual UUIDs or download the complete text list. Changing the version or quantity, or generating again, creates a new batch; changing letter case keeps the same identifiers.
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