UUID Generator

Generate random UUID/GUID identifiers instantly

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    How to Use the UUID Generator

    1. Generate a single UUID — Click "Generate One" to instantly create a random UUID v4.
    2. Generate in bulk — Set the count (1-100) and click "Generate Bulk" to create multiple UUIDs at once.
    3. Copy your UUIDs — Click the copy button next to any UUID to copy it, or use "Copy All" to grab them all at once.

    What is a UUID?

    A UUID (Universally Unique Identifier), also known as a GUID (Globally Unique Identifier), is a 128-bit identifier that is guaranteed to be unique across space and time. UUIDs are formatted as 32 hexadecimal digits displayed in five groups separated by hyphens, for example: 550e8400-e29b-41d4-a716-446655440000. They are widely used in software development for database keys, session tokens, file names, API identifiers, and anywhere a unique reference is needed without a central authority.

    Frequently Asked Questions

    Are UUIDs unique?

    Yes, for all practical purposes. UUID v4 uses 122 random bits, giving approximately 5.3 x 1036 possible values. The probability of generating two identical UUIDs is astronomically low — you would need to generate about 2.7 quintillion UUIDs to have a 50% chance of a single collision.

    What is UUID v4?

    UUID v4 is the most common UUID version. Unlike other versions that incorporate timestamps or hardware addresses, v4 UUIDs are generated entirely from random or pseudo-random numbers. The only fixed bits are the version indicator (4) and the variant bits, making them ideal for most applications that need unique identifiers.

    Is this generator secure?

    Yes. This tool uses the browser's built-in crypto.randomUUID() API, which relies on a cryptographically secure random number generator (CSPRNG). All UUIDs are generated entirely in your browser — nothing is sent to any server, and your generated UUIDs remain completely private.