ToolbitUUID Generator (Version 4)
Generate one identifier or ten thousand, using the browser's cryptographic random source. Handy for seeding fixtures, filling test databases, and naming resources.
What the UUID Generator does
- Cryptographically random v4 UUIDs via crypto.getRandomValues.
- Bulk generation with a configurable count.
- Uppercase, hyphen-free, and braced formatting options.
- One-click copy of the entire generated list.
How to use it
- Set how many UUIDs you need.
- Choose the output formatting.
- Copy the list into your fixture or migration.
Why it runs locally
Toolbit has no backend. The UUID Generator is implemented with standard browser APIs, so your input is processed in the tab and never uploaded, logged, or retained. That is what makes it safe to paste real data into — and it is also why the tool keeps working with the network disconnected, once you have installed Toolbit as an app.
Frequently asked questions
- Are these UUIDs actually random?
- Yes. They come from crypto.getRandomValues, the browser's CSPRNG, not from Math.random.
- Can two generated UUIDs collide?
- With 122 random bits the probability is negligible — you would need to generate billions before a collision became plausible.
- Does it support UUID v7?
- The generator produces v4. For time-ordered identifiers, v7 is best generated in your database or application layer where the clock source is authoritative.