FREE TOOL
UUID generator
Generate one UUID or many, pick a format and copy. Paste a UUID below to see its version and timestamp.
WHAT IT DOES
About this tool
Generate random v4 or time-ordered v7 UUIDs (GUIDs), from one to a thousand at a time. Choose uppercase, no dashes or braces, and inspect any UUID you paste.
Everything runs right in your browser: your text and files are never uploaded or stored.
QUESTIONS
Frequently asked questions
v4 or v7: which UUID should I use?
v7 for database primary keys: it starts with a timestamp, so new rows are stored in order and indexes stay fast. v4 is fully random and fits everything else: file names, tokens, request IDs.
Can two UUIDs ever be the same?
In practice, no. A v4 UUID has 122 random bits. You would need to generate about a billion per second for 85 years to have a 50% chance of a single duplicate.
Are these UUIDs random enough for security?
They come from the browser's cryptographic random number generator. Still, do not use a UUID as the only secret protecting something important: that calls for a proper token.
06 / LET'S GET ACQUAINTED
TELL US
WHAT YOUR
BUSINESS NEEDS
Describe the task. Together we'll
work out the next step.