UUID Validator Online – Debug & Format uuid validator
Validate UUIDs and check their version and format.
UUID/GUID Validation Explained
A UUID (Universally Unique Identifier) is not just a random string; it follows a specific structure defined by RFC 4122. A valid UUID must have 32 hexadecimal digits displayed in five groups separated by hyphens (8-4-4-4-12). Furthermore, certain positions in the string indicate the version and variant of the UUID.
Our validator checks for both the basic format and these internal markers to ensure the identifier is truly valid. This is useful for developers who need to verify data before importing it into a database or debugging unique ID systems.
Common UUID Versions
- Version 1: Generated from a host's MAC address and the current time.
- Version 4: The most common version, generated using random or pseudo-random numbers.
- Version 5: Generated by hashing a namespace and a name using SHA-1.
Frequently Asked Questions
UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information in computer systems. It is represented as a 36-character string in the format 8-4-4-4-12.
Our validator identifies all common versions including v1 (timestamp-based), v3 (MD5-name-based), v4 (random), and v5 (SHA1-name-based).
The variant of a UUID determines its layout and how it should be interpreted. Most modern UUIDs use the RFC 4122 variant.
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