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ZeyroVault Tools

UUID Generator

Generate cryptographically secure UUIDs (v1, v4, v7) or ULIDs in your browser. Zero-knowledge, client-side only.

Version 4 is random, version 7 leads with a 48-bit millisecond timestamp so rows sort by creation time, and version 1 exposes your MAC address. Prefer v7 for anything that becomes a database primary key.

Tool workspace

Your inputs remain on your device.

UUID Version

UUID v4 is recommended for most use cases as it provides strong randomness and security.

Generate up to 10,000 IDs at once; large batches are chunked to keep the page responsive

Format

UUID Validator

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How It Works
How to Generate UUIDs Online

Learn how to generate cryptographically secure UUIDs (v1, v4, v7) using a zero-knowledge, client-side tool.

  1. 1

    Select UUID version

    Choose v1 (time-based), v4 (random), v7 (time-ordered) or ULID based on your use case.

  2. 2

    Set quantity

    Specify how many IDs you need (1-10,000).

  3. 3

    Choose format

    Select standard format, no hyphens, or uppercase.

  4. 4

    Generate and copy

    Click generate and copy the UUIDs to your clipboard.

Common Use Cases
  • 1Generate primary keys for databases and tables without a server round-trip
  • 2Create request IDs for distributed tracing across microservices
  • 3Produce idempotency keys for API retries and payment flows
  • 4Generate collision-resistant identifiers for offline-first apps

Frequently Asked Questions

Which UUID versions are supported?

UUID v1 (time-based), v4 (random), v7 (time-ordered random), and ULID (Crockford base32, also time-sortable).

Are the generated UUIDs random enough?

UUID v4 and v7 use the browser's cryptographic random source. UUID v1 includes a timestamp and node identifier.

Can I generate multiple UUIDs at once?

Yes. Choose a quantity and generate several UUIDs at once, then copy them all with a single click.

When should I choose UUID v7 or ULID over v4?

Choose v7 or ULID when records are inserted in time order and you want identifiers that sort lexicographically, which can reduce index fragmentation in databases. v4 remains the simplest option when ordering does not matter.

Are the generated values validated?

Yes. Each value follows the version and variant bit layout, or the Crockford base32 layout for ULIDs, and invalid output is covered by unit tests. Generation uses the browser's cryptographic random source and stays on your device.

Related Guides

Related Tools

Choose UUID v7 or ULIDUUID v7
Network-verified: see this tool's measured requests
Your inputs remain on your device.

You are responsible for key management and output validation.