UUID Validator

A fast UUID validator that checks RFC 4122 compliance, detects version, and returns a canonical form for reliable API, database, and log validation.

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About This Tool

The UUID Validator checks strings for RFC 4122 compliance and returns a structured assessment. It accepts multiple representations—hyphenated, braces, or urn:uuid—and reports whether the string is a valid UUID, its version, and a canonical hyphenated form for downstream systems.
Conceptually, the tool normalizes input, applies strict length and character validations, and extracts version bits from the canonical form. It does not generate identifiers but provides a reliable, repeatable interpretation that groups can rely on across services.
Developers, QA engineers, database admins, and integration specialists benefit from a consistent identifier standard in API payloads, logs, migrations, and test datasets. The tool's value lies in early error detection, deterministic formatting, and a single source of truth for UUIDs across microservices and data stores.
Key features include format normalization, version detection, and a clear validity signal, plus a compact canonical output suitable for indexing, deduplication, and matching across systems.

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How to Use

Provide the UUID string in any supported format (hyphenated, braces, or urn:uuid).
The tool parses, normalizes, and validates structure against RFC 4122 rules, extracting the version when present.
Review outputs: is_valid, version (if applicable), and canonical_form.
Use the canonical UUID in code, logs, databases, or API payloads to ensure consistent references.
If invalid, consult the error_code to diagnose length, characters, or format issues.

Frequently Asked Questions

Find Quick Answers

What formats does the UUID checker accept and how does it handle case?

The checker accepts hyphenated, braces, and urn:uuid forms, with any letter case. It normalizes to lowercase hyphenated form for canonical output, and reports details such as version when available. Whitespace is ignored.

How is the UUID version determined?

Version is extracted from the canonical 32- hex-digit sequence, specifically the 13th-16th digits as defined by RFC 4122. If the input lacks a version, the version field is null while validity may still be reported.

What outputs are produced?

Outputs include is_valid, version, normalized form, and format descriptor. If valid, you receive a lowercase, hyphenated UUID; if invalid, an error_code explains the failure reason such as length or non-hex characters.

Is this tool suitable for production pipelines?

Yes. It provides deterministic UUID interpretation, enabling consistent identifiers in logs, databases, and API payloads. It is designed for integration into validation steps, data pipelines, or test data generation with clear failure signals.

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