UUID Validator
Check whether a value matches a standard UUID format.
How to Use the UUID Validator
Paste a UUID to check whether its structure matches a supported UUID format and, when possible, identify its version.
Practical Example
The value 550e8400-e29b-41d4-a716-446655440000 follows the familiar 8-4-4-4-12 UUID layout and indicates version 4 in its version field.
Factors That Affect the Result
Hyphen placement, hexadecimal characters, UUID version bits, variant bits and optional braces can affect validation.
Frequently Asked Questions
What is a UUID?
A UUID is a standardized identifier commonly represented as 128 bits of data.
Does a valid UUID prove it exists in a database?
No, validation checks format rather than whether the identifier is actually assigned.
Can uppercase UUIDs be valid?
Yes, hexadecimal letters are generally case-insensitive.
What UUID Validation Checks
A UUID validator checks whether text follows the expected universally unique identifier structure. Standard textual UUIDs are commonly written as 32 hexadecimal digits separated by hyphens in an 8-4-4-4-12 pattern. Validation can also inspect version and variant bits when those details are relevant.
Valid Format Does Not Mean Trusted Data
A string can be syntactically valid without being known, unique within your database, authorized, or safe to use. Validation should therefore be treated as a format check rather than proof that an identifier belongs to a real record.
When importing UUIDs, trim unintended whitespace and confirm whether your application accepts uppercase letters, lowercase letters, braces, or compact forms without hyphens. Systems often normalize UUIDs before comparison. If a specific version is required, validate that requirement separately instead of accepting every correctly shaped UUID.