UUID Validator

What Is a UUID?

A UUID (Universally Unique Identifier) is a 128-bit identifier standardized by RFC 9562 (formerly RFC 4122). UUIDs are designed to be unique across space and time without requiring a central registration authority. They are commonly used as database primary keys, API resource identifiers, session tokens, and distributed system identifiers. UUIDs have different versions: v1 (time-based, using timestamp and MAC address), v4 (random), v7 (time-ordered random), and others. This tool validates UUID strings, detects their version (v1 through v8) and variant (RFC 9562, Microsoft, Reserved), and for time-based UUIDs (v1, v6, v7), extracts the embedded timestamp. It also supports bulk validation for analyzing multiple UUIDs at once. UUID validation is essential for data integrity, API request checking, and database import verification.

How to Use This Tool

1. Enter UUIDs — Type or paste one or more UUIDs into the input area (one per line for multiple).
2. Click Validate — The tool checks each UUID's format, detects its version and variant, and displays the results.
3. Review analysis — Each UUID shows its validity status, version number, variant type, and for time-based UUIDs, the embedded timestamp.
4. Generate UUIDs — Click Generate v4 for a random UUID or Generate v7 for a time-ordered UUID.
5. Use examples — Click the example buttons (v4, v1, v7, Mixed) to see different UUID types and their analysis.

Frequently Asked Questions