🧑‍💻 Developer

UUID Generator

Generate random version-4 UUIDs (GUIDs) in bulk.

Results

UUIDs

📊 UUID Generator chart

Character composition of the result: letters, digits, spaces, punctuation and other symbols.

What is the UUID Generator?

Generate random version-4 UUIDs (GUIDs) in bulk. Everyday utilities for developers — encoders, formatters, hashes and generators — that run locally in your browser with standard Web APIs. No data is sent to any server.

UUID Generator – free online developer tool illustration
UUID Generator — free, exact and private.

How to use the UUID Generator

  1. Enter your how many.
  2. Tick the options you need: uppercase.
  3. Press the Generate button — press it again for a fresh result.
  4. Read the output: uuids.
  5. Use the 📊 chart to see the result visually, then copy or share it.

Formula and method

RFC 4122 version 4: 122 random bits, version and variant bits set

Tips for better results

  • Hashes use the Web Crypto API and match command-line tools such as sha256sum.
  • Never paste production secrets into any website — even client-side tools.
  • Use JSON Validator before JSON Formatter to see precise error positions.

Frequently asked questions

What does the UUID Generator do?

Generate random version-4 UUIDs (GUIDs) in bulk.

How is it calculated?

The UUID Generator uses this method: RFC 4122 version 4: 122 random bits, version and variant bits set.

Is the UUID Generator accurate?

Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.

Is this tool free and private?

Yes — the UUID Generator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

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