UUID Generator - Free Online | FunToolX
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About this tool
UUID Generator is a free online generator. Generate standard UUID v4 unique identifiers. Generate text, codes, and assets with one click. It runs entirely in your browser — no download or sign-up needed.
Select the UUID version (v4 random, v1 based on timestamp and MAC address), set the number of generation (1-1000), and select the format (standard hyphen, non-hyphen, upper case, lower case). After clicking Generate, a list will be displayed, and you can copy all or a single UUID with one click.
UUID v4 uses crypto.getRandomValues() to generate 122-bit random numbers, with a very low collision probability (about 1 in 2^122). UUID v1 is based on the current time and the MAC address of the network card to ensure time order. The format follows the RFC 4122 standard.
Suitable for scenarios that require global unique identification, such as database primary key generation, session ID, and file naming. It is safer than self-increasing ID. It is not easy to guess.
UUID generation tool, which generates UUID v4 (random) or v1 (time-based) in batches, supports upper/lower case, de-hyphen and other formats.