Free UUID Generator Online
Generate UUID v4 (random) or v1 (time-based) identifiers. Bulk generate up to 100 UUIDs and copy them instantly. All processing runs locally in your browser.
Generated UUIDs
When You Need UUIDs
Database Keys
Assign globally unique primary keys without a central ID server.
API Resources
Identify records in REST responses and distributed logs.
Session Tokens
Generate opaque identifiers for client sessions or trace IDs.
UUID Generator FAQ
What is the difference between UUID v4 and v1?
UUID v4 uses random bits and is the default for most applications. UUID v1 embeds a timestamp and is sortable by creation time but reveals timing information.
Are generated UUIDs cryptographically secure?
Yes. This tool uses crypto.getRandomValues() and the browser's crypto.randomUUID() API when available.
Is my data uploaded?
No. UUIDs are generated entirely in your browser and never sent to a server.