What is the difference between UUID v1 and v4?

UUID v4 is entirely random, generated using cryptographically secure pseudorandom numbers. UUID v1 is timestamp-based, generated using a combination of the current time and a node identifier.

Is it safe to use these UUIDs in production?

Yes. For v4 UUIDs, this tool uses the standard browser Crypto API (window.crypto.randomUUID) which provides high-entropy cryptographically secure random values suitable for production identification.

Are the generated UUIDs saved or tracked?

No. The generation process executes 100% locally in your web browser. No telemetry or logged tokens ever leave your machine.

Generated UUID Strings (0)

UUID Generator

UUID Version

Quantity10

Format OptionsUppercase LettersInclude HyphensWrap with Braces

Offline SecureAll operations run client-side. No network data transfer ensures 100% token privacy.

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How to Use the UUID Tool

Generate RFC 4122 compliant v1 and v4 cryptographically secure UUID tokens.

1
Select the UUID version: v4 (random) or v1 (time-based).
2
Use the slider to adjust the generation quantity (from 1 to 100).
3
Toggle formatting options like uppercase casing, hyphens, or wrapping braces.
4
Click "Copy All" to save all generated UUIDs to your clipboard or copy individual tokens.

Why Choose Our UUID?

100% Private & Client-Side

All generation happens locally in your browser memory. No data or generated keys are ever sent to any servers.

Bulk Generation

Generate up to 100 UUIDs at once instantly. Perfect for developers needing large test datasets.

Flexible Formatting

Easily toggle uppercase casing, include or exclude hyphens, and wrap with braces to match your project rules.

Cryptographically Secure

Uses standard Web Crypto API for random v4 generation, ensuring high entropy and collision resistance.

Frequently Asked Questions

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