Generate random UUID v4 identifiers online for free. Create single or bulk UUIDs for databases, APIs, and application development. No signup required.
First time here? Click Generate to create a UUID Your input is processed locally and disappears when you close the tab.
Unique identifiers are the glue of modern software — primary keys, request IDs, and object references all depend on them. Our free UUID Generator is a fast uuid generator online that creates standards-compliant identifiers using cryptographically secure randomness from your browser's Web Crypto API, so every value is practically guaranteed to be unique across systems.
Choose the version that fits your architecture: v4 works as a classic uuid v4 generator producing 122 random bits, v1 encodes a Gregorian timestamp with a random node, v7 is time-ordered for index-friendly database keys (RFC 9562), and the nil option returns the all-zero placeholder. Output can be uppercased or stripped of dashes for a compact GUID, and bulk mode acts as a bulk uuid generator that creates up to 1,000 UUIDs in a single click. Copy any value, copy the whole list at once, or download everything as a .txt file — ideal for seeding databases, mocking API payloads, and generating test fixtures.
Because generation happens entirely client-side, no identifier is ever transmitted or logged, and what you create stays on your device. Pair the tool with our Password Generator for secure credentials, the Random Number Generator for numeric test data, or the MD5 Hash Generator for checksums. Once your records are populated, the JSON Formatter makes the resulting payloads easy to read and validate.
Click Generate to create a UUID
Optionally set how many to generate
Choose format (uppercase, lowercase, no dashes)
Copy individual UUIDs or the entire list
0f764727-8e25-4c3c-9af6-7834855c749c1 UUID · Version 4 — 122 random bits from the Web Crypto API.