UUID Generator Online Free
Generate UUID v1, v4, and v5 instantly. Bulk generate up to 1000 UUIDs at once, choose your format, validate existing UUIDs, and export as a list. Everything runs in your browser.
Why Use a UUID Generator Online Free
UUIDs are the standard way to create unique identifiers across distributed systems, databases, APIs, and file systems. This UUID generator online free produces cryptographically random v4 UUIDs, time-based v1 UUIDs, and deterministic v5 UUIDs.
UUID v4 is the most common choice for general use. It is random and statistically impossible to collide. UUID v1 embeds a timestamp, which makes it sortable. UUID v5 is deterministic: the same namespace and name always produce the same UUID.
The validator tells you whether a UUID is valid and which version it is. Useful for debugging API responses or verifying identifiers before inserting them into a database.
What this tool does
How to use it
Choose version
Select v4 for random, v1 for time-based, or v5 for deterministic output.
Set count
Enter how many UUIDs to generate, from 1 up to 1,000.
Generate
Click Generate UUID. Single output shows prominently; bulk fills a text area.
Export
Copy to clipboard or download all UUIDs as a text file.
FAQ: UUID Generator Online Free
Yes. No signup required and no limits. Generate as many UUIDs as you need, forever free.
UUID v4 is random and the most widely used. UUID v1 is based on the current timestamp, making it sortable. UUID v5 is deterministic: given the same namespace and name, it always produces the same UUID, which is useful for reproducible identifiers.
UUID v4 generation uses crypto.getRandomValues, the browser API backed by the operating system cryptographic random number generator. This is the same source used by security-sensitive software.
Yes. Enable the No hyphens option to get a compact 32-character hex string. Some databases and APIs prefer this format.
UUID v5 creates the same UUID every time for a given namespace and name. This makes it useful for content-addressed identifiers, deduplication, or anywhere you need a stable ID derived from a known input, like a URL or domain name.
Scroll to the Validate a UUID section, paste any UUID into the input field, and click Validate. The tool checks the format and reports which version it is.