genuuid.net

UUID v1 Generator (Timestamp)

UUID v1 is timestamp-based. It’s useful for legacy systems and time-ish ordering, but it can reveal information (like creation time) that you may not want to expose publicly. For many modern apps, prefer v4 or v7.

UUIDv1

$current_uuid
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Generatorv1

$count
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FAQ

What is UUID v1?

UUID v1 is a timestamp-based UUID format. It combines time with a node identifier to produce unique values.

Is UUID v1 safe to expose publicly?

It depends. UUID v1 is useful when you want roughly time-ordered IDs and legacy compatibility, and it can be fine for internal identifiers or cases where leaking creation time isn’t a concern. The downside is that v1 encodes a timestamp (and can include a node identifier), which may reveal metadata and ordering. For public-facing IDs, v4 or v7 is usually a better default.

Can I bulk-generate UUID v1 values here?

Yes — generate a single UUID or bulk-generate up to 500 at once and copy them in one click.