Generate unique identifiers (UUID v1, v4) with bulk generation and export
Time-based UUIDs generated using timestamp and random node identifier. Sortable by creation time.
Random UUIDs with 122 bits of entropy. Most commonly used. Globally unique with extremely low collision probability.
Database primary keys, session IDs, file names, API request IDs, distributed system identifiers.
Hop to nearby dev utilities without losing context.
Quick steps so you can get results fast.
Use v4 for standard random identifiers.
Generate between 1 and 100 values.
Each click creates a fresh set.
Copy one value, all values, or download them as a list.
Everything you need to know about UUID Generator.
Answers to the most common devtool questions.
Not exactly. It is a simplified time-based ID that starts with the current time in milliseconds and is otherwise random; it does not follow the full RFC 4122 v1 layout. Use v4 when you need standard UUIDs.
In practice no: with 122 random bits, the chance of a collision is negligible even across billions of IDs.
No. This tool runs in your browser with JavaScript, and what you type or paste is not sent to ToolzStack servers. Page visits are measured with Google Analytics, as described in the Cookie Policy.
Your input stays in the page while it is open. A few tools keep a short history or favourites in the local storage of this browser; you can clear it in the tool or in your browser settings.
Use Report a Bug on the page or the contact form, and include a sample input that shows the problem (remove anything sensitive first).