Free Online GUID Generator
Generate a new random GUID instantly — or switch to UUID. Cryptographically secure, created entirely in your browser, and never transmitted anywhere.
Choose your generator
Two focused tools sharing the same private, local engine.
Built for privacy and speed
localguid keeps the parts developers actually want and drops the ads, trackers, and server round-trips.
Private by design
Identifiers are generated locally in your browser. Nothing is uploaded, logged, or stored on any server.
Cryptographically secure
Randomness comes from the Web Crypto API, so v4 values have 122 bits of entropy and negligible collision risk.
Multiple versions
Generate UUID/GUID v4 (random), v7 (time-ordered), v1 (timestamp), or the Nil placeholder.
Bulk & download
Produce up to 10,000 values at once, copy the whole list, or export a .txt file for seeding data.
Works offline
Once the page loads, it keeps generating even with no connection — no API calls required.
No ads, no clutter
A fast, focused tool with no banner ads, popups, or tracking getting in the way of your work.
GUID vs. UUID — what's the difference?
A UUID (Universally Unique Identifier) and a GUID (Globally Unique Identifier) are the same thing: a 128-bit value written as 32 hexadecimal digits in the 8-4-4-4-12 pattern. The only difference is naming — "GUID" is the term Microsoft uses across Windows, .NET, and SQL Server, while "UUID" is used almost everywhere else. Both follow the same standard (RFC 9562) and can be used interchangeably.
Because each value can be generated independently on any device with an essentially zero chance of collision, they are the go-to choice for database primary keys, distributed systems, API resource IDs, and any situation that needs a guaranteed-unique identifier without a central authority.