UUID Generator

Generate UUID v1, v3, v4, v5, NIL and Max identifiers, or parse an existing UUID to inspect its version, variant and v1 metadata.

Runs locally — nothing is uploaded

UUID Version

Number of UUIDs

Between 1 and 100

UppercaseNo hyphens

UUIDs are generated locally in your browser. v1 embeds a time-based timestamp, v3 uses MD5 over a namespace and name, v4 is fully random, v5 uses SHA-1 over a namespace and name, and v7 encodes a Unix millisecond timestamp for time-ordered IDs. NIL and Max are special all-zero and all-F values.

How to Use

What is a UUID? A UUID (universally unique identifier) is a 128-bit value. This tool generates several UUID versions and can parse existing ones to show version, variant and v1 metadata.

How to generate 1. Pick a version: v1 (time based), v3 (MD5 namespace), v4 (random), v5 (SHA-1 namespace), v7 (Unix millisecond timestamp), NIL or Max. 2. Choose a count from 1 to 100. 3. For v3 and v5, choose a namespace preset (DNS, URL, OID, X500) or enter a custom namespace, then type a name. 4. Optionally switch to uppercase or no-hyphen output. 5. Click Generate, then copy a single UUID or all of them.

How to parse 1. Switch to the Parse tab. 2. Paste a UUID such as 9073926b-929f-31c2-abc9-fad77ae3e8eb. 3. The tool shows the version and variant, for v1 the embedded timestamp, node and clock sequence, and for v7 the millisecond timestamp.

UUID Generator

How to Use

What is a UUID? A UUID (universally unique identifier) is a 128-bit value. This tool generates several UUID versions and can parse existing ones to show version, variant and v1 metadata.

How to parse 1. Switch to the Parse tab. 2. Paste a UUID such as 9073926b-929f-31c2-abc9-fad77ae3e8eb. 3. The tool shows the version and variant, for v1 the embedded timestamp, node and clock sequence, and for v7 the millisecond timestamp.

Examples - v3 for the DNS namespace and name example.com is 9073926b-929f-31c2-abc9-fad77ae3e8eb. - A NIL UUID is all zeros and a Max UUID is all Fs.

Privacy All generation and parsing happen locally in your browser.