UUID validator. Validate UUID strings and identify the UUID version (v1 through v5). Supports standard UUID format with or without hyphens.
100% browser-based — your data never leaves your device
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UUID Validator is a free online security tool that validate uuid strings and identify the version (v1, v2, v3, v4, v5). It works entirely in your browser — no downloads, no installations, and no server uploads required. security engineers, backend developers, system administrators use UUID Validator when they need a fast, privacy-respecting way to process security data without installing additional software. It supports capabilities such as version detection, format validation, hyphen flexibility. Additional features include real-time checking. Common use cases include validating uuids from user input in web forms and api request validation, identifying uuid version for schema compatibility in database migrations, debugging uuid generation issues in distributed systems and microservices. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes UUID Validator ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
UUID Validator is a free online security tool that helps you validate uuid strings and identify the version (v1, v2, v3, v4, v5). Key capabilities include version detection, format validation, hyphen flexibility. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to validating uuids from user input in web forms and api request validation.
Type or paste a UUID string into the input field. Accepts formats with or without hyphens.
The UUID is validated automatically in real-time, showing whether it's valid and which version it is.
See the UUID version, variant, and a breakdown of the UUID structure.
| Category | Details |
|---|---|
| Input Limits | Maximum input size: Browser memory bound |
| Key sizes: 128–4096 bits (algorithm dependent) | |
| Supported Formats | Raw text, Hex, Base64, Binary, JWT / JWS / JWE |
| Browser Engine |
|
All operations run entirely in your browser using built-in Security APIs. No server uploads, no data storage, and no third-party requests.
UUID Validator is ideal when you need to validating uuids from user input in web forms and api request validation without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For for command-line cryptographic operations, consider using OpenSSL CLI. For for enterprise secret management, HashiCorp Vault may be a better fit. UUID Validator fills the gap between heavyweight desktop tools and insecure online services that require uploading your data.
No. UUID Validator processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
Versions 1 (time-based), 2 (DCE security), 3 (name-based MD5), 4 (random), and 5 (name-based SHA-1) can be detected from the version bits.
A UUID is a 128-bit value typically displayed as 32 hexadecimal digits in the format 8-4-4-4-12 (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx).
Identifies UUID versions v1, v2, v3, v4, and v5 based on the variant and version bits.
Validates UUID format per RFC 4122 including correct character set and length.
Accepts UUIDs with or without hyphens and in uppercase or lowercase.
Validation updates as you type with instant feedback on UUID validity.
UUID Validator is useful in a variety of scenarios across different workflows:
Validating UUIDs from user input in web forms and API request validation
Identifying UUID version for schema compatibility in database migrations
Debugging UUID generation issues in distributed systems and microservices
UUID v4 (random) is the most widely used version. UUID v7 is time-ordered and sorts naturally by creation time for database indexing.
Many systems accept UUIDs with or without hyphens. This tool validates both formats for maximum compatibility.
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