UUID Generator
Generate random UUID v4 identifiers instantly.
About UUID Generator
ToolsOfIndia built the UUID Generator for developers, database users and system builders who want straight answers in plain language. Generate universally unique identifiers - UUIDs or GUIDs - in version 4 by default, with versions 1 and 5 also available, and copy a single value or a batch at once. UUIDs are used as primary keys, request IDs and unique names where a sequential ID would clash, and the tool produces them with a high-quality random source. Developers use it to create test IDs, database users for primary keys, and because everything runs locally, nothing is uploaded. The tool also strips hyphens and offers uppercase output for different system needs. It is the UUID tool that hand-generating unique IDs always risks a clash. Being browser-based and offline-capable, it is safe for sensitive values: nothing you type is transmitted or stored anywhere but your own machine. It earns its keep when generating test IDs for a database, when creating a unique request ID, and whenever producing a batch of UUIDs for a load. Pair it with the related tools listed alongside for a complete workflow.
How to Use the UUID Generator
- Open the UUID Generator tool above — it loads instantly in your browser.
- Enter your values in the input fields provided.
- The result updates immediately — no calculate button needed (or click Calculate where shown).
- Copy or use your result directly. Nothing is stored or sent to any server.
Key Features of UUID Generator
- Random UUID v4
- Copy format
- Bulk generate
- UUID versions 1, 4 and 5
- Single or batch output
- Hyphen and uppercase options
Related Searches for UUID Generator
uuid • guid • unique id • identifier • uuid v4 • random uuid • universally unique • uuid generator • guid generator • uuid online • unique id generator • uuid maker — all available free on ToolsOfIndia.com.
Frequently Asked Questions
What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier formatted as 32 hex characters in 8-4-4-4-12 groups. UUID v4 uses random numbers for uniqueness.
How unique are UUIDs?
UUID v4 has 122 random bits, providing about 5.3 x 10^36 possible values. The probability of collision is practically zero - you can generate billions per second for centuries.
What are UUIDs used for?
UUIDs are used as database primary keys, API identifiers, session tokens, transaction IDs, file names, and anywhere globally unique identifiers are needed without a central authority.
What is a UUID version 4?
A random UUID, the most common type, where the version bits are fixed and the rest are random, giving a practically unique value.
Are UUIDs really unique?
A version 4 UUID is so large that a collision is astronomically unlikely, which is why they are used as unique keys.