What does this UUID version checker do?

Determines the version (1‑7) of each UUID and verifies canonical formatting. It can also decode timestamps embedded in v6/v7 identifiers when present.

How can I tell what version a UUID is?

The version is encoded in the 13th hexadecimal character of the UUID (the first nibble of the third group). For example, 'f47ac10b-58cc-0372-8567-0e02b2c3d479' is version 0 (invalid), while '...-7...' indicates version 7.

Does the validator work offline?

Yes. All processing occurs in your browser with no data sent to a server, so the tool works completely offline once loaded.

How accurate is version detection?

The tool reads the 13th hexadecimal character of the UUID; if it’s 1–7 and the variant nibble is valid (8‑b), the version is reported. Strings not matching the canonical pattern are flagged invalid.

Free · Client-side · UUID Version Identifier

UUID Version Checker

Determine the version of a UUID (1‑7) and verify formatting instantly. Paste one or many values to inspect.

Part of WebEasier's UUID toolkit — the most complete UUID resource on the web.

UUID Version Checker

Identify version nibble & confirm format

All version checks are performed in your browser; no data is transmitted or stored.

UUIDs

Results will appear here.
Paste one or more UUIDs and click Check Version.

What does this version checker do?

It determines the version (1‑7) of each UUID string and verifies the canonical format. Enter multiple values to inspect them in bulk.

Supported Versions

1–7
All standard UUID versions are recognized.

Timestamp Decoding

Extracts time from v6/v7 identifiers when present.

Privacy

All processing happens in your browser; no data is sent to any server.

Bulk

Paste multiple UUIDs (one per line) for batch version checking.

Version Info

How UUID Version Checking Works

This tool checks strings against the standard UUID format (8-4-4-4-12 hex digits with hyphens). It ensures the version nibble (first character of the third group) is between 1 and 7, and the RFC 4122 variant bits are valid (8,9,a,b). Multiple UUIDs may be entered one per line.

When a UUID is checked, the detected version is displayed. For versions 6 and 7 the embedded timestamp is decoded into a human-readable date.

Format Example

xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx

M = version (1‑7), N = variant (8‑b)

Tips

Practical Notes

Paste multiple UUIDs, one per line; blank lines are ignored.
Input is case-insensitive and extra whitespace is trimmed.
Version nibble outside 1‑7 flags the string as invalid.
All version checks happen locally; no data is transmitted.

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