UUID and ULID generator
Create identifiers for databases, tests and APIs. Generate up to 10,000 UUIDs at once, pick version 4, the time ordered version 7, name based version 5 or ULID, and format them with quotes, braces, uppercase or as a JSON array. Paste any id to see what kind it is and when it was created.
Tooloat runs in your browser and needs JavaScript. It opens in a moment, and your files are processed on your device.
How it works
- Choose the identifier type and how many.
- Set the output format.
- Copy or download the list.
Why use it
- UUID v4, v7, v5, nil and ULID.
- Up to 10,000 at once.
- JSON, CSV, quoted and braced formats.
- Decode the timestamp inside v7 and ULID.
Questions and answers
What is the difference between v4 and v7?
Version 4 is fully random. Version 7 starts with a timestamp, so ids sort by creation time, which is friendlier to database indexes.
Are these random values secure?
They come from your browser cryptographic random number generator.
Could two ids collide?
The chance is negligible for random UUIDs.
Related tools
- Hash generator and file checksum calculatorCheck that a download is intact or that two files are identical.
- Strong password generatorCreate passwords that are actually hard to guess.
- Unix timestamp converterTurn an epoch value into a readable date, or a date into a timestamp.
- Base64 encoder and decoderConvert text or files to Base64 and back.