UUID Generator

Generate one or many UUIDs (Universally Unique Identifiers) in v4 or v1 format. Copy individual UUIDs or the entire list with one click.

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    Frequently Asked Questions

    What is a UUID?

    A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit identifier formatted as 32 hexadecimal digits in five groups separated by hyphens: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. The design guarantees practical uniqueness without central coordination — the odds of a collision are astronomically low.

    What is the difference between UUID v4 and v1?

    UUID v4 is randomly generated — all bits except the version and variant are random, making it the most common choice for general use. UUID v1 embeds the current timestamp and a node identifier, which makes it sortable by creation time but means two UUIDs generated at the same instant on the same machine can be very similar.

    Is UUID the same as GUID?

    Yes. GUID (Globally Unique Identifier) is Microsoft's name for the same standard. The format and generation rules are identical.

    Can I use these UUIDs in production?

    Yes. This tool uses the browser's built-in cryptographic random number generator (`crypto.randomUUID()` or `crypto.getRandomValues()`), the same source used by production UUID libraries. The generated identifiers are suitable for use as database primary keys, tokens, and other production identifiers.

    What does "no hyphens" format mean?

    The standard UUID format includes four hyphens as separators. The "no hyphens" option removes them, giving you a compact 32-character hexadecimal string. Both formats represent the same value — use whichever your system expects.