UUID Generator

Generate UUID v4 and v7.

How UUIDs work

A UUID is a 128-bit identifier. Version 4 is 122 random bits from crypto.getRandomValues(). Version 7 (RFC 9562) starts with a millisecond timestamp, so values sort by creation time — handy as database keys.

DevCipher forces v7 timestamps to increase within a batch. UUIDs are unique, not secret: do not use them as passwords or tokens.

Processed locally in your browser — your input is never uploaded.

What is UUID Generator?

Generate UUID v4 and v7. A UUID is a 128-bit identifier. Version 4 is 122 random bits from crypto.getRandomValues(). Version 7 (RFC 9562) starts with a millisecond timestamp, so values sort by creation time — handy as database keys.

Is UUID Generator free to use?

Yes. UUID Generator on DevCipher is completely free, with no sign-up, no limits and no ads.

Is my data safe when I use UUID Generator?

Yes. Everything runs locally in your browser. Your input is never uploaded to a server, and sensitive values such as keys and tokens are never saved.

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