UUID Generator
Produce one or many version-4 UUIDs with options for uppercase formatting and hyphen removal.
How it works
- 1
Set the count to get one UUID or up to 100 at once.
- 2
Toggle uppercase or hyphen removal to match your project's format requirement.
- 3
Press Generate, then copy the result or download it as a text file.
Questions
What version of UUID does this produce?
All output is version 4 (random). Version 4 UUIDs use 122 bits of random data, making collisions astronomically unlikely.
How is the randomness sourced?
The generator calls crypto.randomUUID(), which is provided by your browser's cryptographic subsystem — the same source used for security-sensitive operations.
Can I use these UUIDs as database primary keys?
Yes. UUIDs are globally unique by design. Just keep in mind that random v4 UUIDs are not sequential, which can affect index performance in some databases.
Are these UUIDs generated on a server?
No. They are generated entirely inside your browser; nothing is sent to or stored on any server.
More text tools
Word Counter
Count words, characters, sentences, and paragraphs as you type, with reading and speaking time.
Character Counter
Count every character in your text — total and without spaces — as you type.
Sentence Counter
Count sentences and see average words per sentence update as you type.
Paragraph Counter
Count paragraphs and get average sentences, words, and characters per paragraph.
Reading Time Estimator
Estimate how long it takes to read your text at an adjustable reading speed.
Speaking Time Estimator
Calculate how long it takes to deliver your text aloud at a chosen speaking pace.
Uppercase Converter
Convert any text to uppercase instantly, with full support for accented and international characters.
Lowercase Converter
Convert any text to lowercase instantly, handling accented and international characters correctly.