UUID / GUID Generator

Generate cryptographically random UUID v4 values instantly

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About This Tool

The UUID/GUID Generator is a free online tool that creates cryptographically secure UUID version 4 (random-based) identifiers. UUIDs (Universally Unique Identifiers) are 128-bit numbers used to uniquely identify information in computer systems. They're commonly used in databases, distributed systems, APIs, and file formats.

Unlike other online UUID generators that might send your requests to servers, our tool generates UUIDs entirely locally in your browser using the Web Crypto API when available. This ensures 100% privacy — no data leaves your device.

How to Use

  1. Enter how many UUIDs you need, from 1 up to 100.
  2. Check the Uppercase option if you want capital letters in your UUIDs.
  3. Press the Generate UUID(s) button to create cryptographically random UUID v4 values.
  4. Click Copy All to copy the generated UUIDs to your clipboard.

Why Choose OmniTools

⚡ Instant Generation

Generate UUIDs instantly in your browser with no server latency.

🛡️ 100% Private

All generation happens locally. No data is sent to any server.

📁 Bulk Generation

Generate up to 100 UUIDs at once for batch processing needs.

🎯 Cryptographically Secure

Uses Web Crypto API for truly random, secure UUID generation.

Frequently Asked Questions

What UUID version does this generate?

This tool generates UUID version 4, which is based on random numbers.

Does it support UUID version 1?

No, this generator only supports UUID v4 (random-based).

How many UUIDs can I generate at once?

You can generate up to 100 UUIDs in a single batch.

Can I use this tool offline?

Yes. All processing happens entirely in your browser with no server connection.

What's the difference between UUID and GUID?

UUID (Universally Unique Identifier) and GUID (Globally Unique Identifier) are essentially the same standard. GUID is Microsoft's implementation of UUID.

Are the UUIDs truly random?

Yes, they use cryptographically secure random number generation via the Web Crypto API when available.

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