How random are the generated IDs?

The IDs are generated using crypto.getRandomValues, the browser's cryptographically strong random number generator. Each character is independently random, making the IDs suitable for most practical purposes.

How likely is a collision?

With a length of 10 characters using a 36-character alphabet, you would need to generate billions of IDs before a collision becomes remotely probable. The tool shows the exact mathematical probability for your settings.

Can I use these as database primary keys?

Yes. The random IDs are suitable for use as unique identifiers in databases and distributed systems. The configurable length lets you balance key size against collision safety.

Random ID Generator

Generate random alphanumeric identifiers with configurable length, batch output, and real-time collision probability estimates.

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tool.cuid2-generator.identifiers

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How to use Random ID Generator

Set your desired ID length (2-32 characters).
Choose how many IDs to generate (1-100).
Click Generate and copy your random identifiers.

What is Random ID Generator?

This tool generates cryptographically strong random IDs using crypto.getRandomValues. Each ID starts with a lowercase letter followed by alphanumeric characters, making them safe for use in URLs, database keys, and distributed systems.

Customize the ID length from 2 to 32 characters, generate up to 100 IDs at once, and see the mathematical collision probability for your chosen parameters. All generation happens client-side in your browser.

FAQ

How random are the generated IDs?: The IDs are generated using crypto.getRandomValues, the browser's cryptographically strong random number generator. Each character is independently random, making the IDs suitable for most practical purposes.
How likely is a collision?: With a length of 10 characters using a 36-character alphabet, you would need to generate billions of IDs before a collision becomes remotely probable. The tool shows the exact mathematical probability for your settings.
Can I use these as database primary keys?: Yes. The random IDs are suitable for use as unique identifiers in databases and distributed systems. The configurable length lets you balance key size against collision safety.

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Author

Marcus Webb"The DevTool Craftsman"

Full-Stack Developer & Tools Architect

Marcus has been writing code since the dial-up era. He has contributed to open-source developer tools, built CI/CD pipelines for startups, and debugged production incidents at 3 AM more times than he would like to admit. His philosophy is that the best developer tool is the one that gets out of your way, and he writes about practical tooling that helps teams ship faster with fewer headaches.

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