UUID Generator
Generate unique IDs.
Generate unique IDs.
How to use UUID Generator
- Pick how many version 4 UUIDs you need
- Toggle uppercase output or strip the hyphens
- Copy all UUIDs at once or regenerate a fresh batch
About UUID Generator
Generate version 4 UUIDs — also called GUIDs — instantly in your browser, with no install and no code to write. Choose how many you need (up to 100 at a time), then copy the whole batch with one click or hit Regenerate for a fresh set. GUID and UUID are two names for the same 128-bit identifier, so this works whether your stack calls them one or the other. Because it's an online tool, it's the fastest way to grab a random UUID when you don't want to open a Python shell or spin up a Java, JavaScript, or .NET project just for a single value.
Two toggles let you match whatever format your system expects: switch letters to uppercase A–F, or remove the hyphens for a compact 32-character string that fits filenames, keys, and tight config fields. The default hyphenated, lowercase output works as-is for database primary keys, session and request IDs, and API objects.
Every value is produced by your browser's built-in crypto.randomUUID generator, so each UUID comes from 122 cryptographically random bits — the randomness a v4 UUID needs to be treated as unique across databases and distributed systems. Nothing runs on a server: the identifiers are created on your own device and never uploaded, logged, or stored, so they stay completely private to you.
Frequently asked questions
- Is this UUID generator free?
- Yes, it is 100% free with no account, sign-up, or usage limits. Generate as many UUIDs as you need, as often as you like.
- Is my data uploaded or stored anywhere?
- No. Every UUID is generated locally in your browser using the native crypto.randomUUID function. Nothing is sent to a server, logged, or stored, so the values stay completely private to you.
- What version of UUID does this generate?
- It generates version 4 (v4) UUIDs, which are based on random numbers. This is the most common type, used for database keys, session IDs, request IDs, and general-purpose unique identifiers.
- Does this generate random UUIDs?
- Yes. Version 4 is the random UUID format, so every value is drawn from your browser's cryptographically secure random source rather than from a timestamp or hardware address. Click Regenerate any time you want a brand-new random batch.
- Is a GUID the same as a UUID?
- Yes. GUID (globally unique identifier) is Microsoft's name for the same 128-bit value the rest of the world calls a UUID. The UUIDs this tool produces are valid GUIDs, so they paste straight into SQL Server, .NET, or any Windows tooling.
- Are these UUIDs truly unique and safe to use?
- Version 4 UUIDs are generated from 122 random bits using your browser's cryptographically secure random generator. The chance of a collision is so vanishingly small that they are treated as unique in practice for databases and distributed systems.
- Can I generate multiple UUIDs at once?
- Yes. Enter any number up to 100 in the How many field and every UUID appears in the output box. Use the Copy button to grab them all at once, one per line.
- What do the uppercase and remove hyphens options do?
- Uppercase converts letters a-f to A-F, and remove hyphens strips the four dashes to give a compact 32-character string. Both are useful for matching specific database, filename, or API formats.
- How do I generate a UUID in Python?
- In Python, import the built-in uuid module and call str(uuid.uuid4()) for a random v4 value. That is exactly what this page does for you, so if you only need a few identifiers you can copy them here instead of running a script.
- How do I generate a UUID in Java?
- In Java, java.util.UUID.randomUUID().toString() returns a random v4 UUID with no extra library. This tool gives you the same output in the browser when you would rather not compile code for a one-off value.
- How do I generate a UUID in JavaScript?
- Modern browsers and Node expose crypto.randomUUID(), which returns a v4 string, and this tool calls that exact function. In older environments you would pull in a package like uuid, but for a quick value you can just copy one from here.
- How do I generate a UUID in .NET or C#?
- In C#, Guid.NewGuid().ToString() produces a random identifier. Because a GUID is the same thing as a UUID, any value from this generator drops straight into .NET code, SQL Server keys, or config files.
- Do I need to install anything or create an account?
- No. This is a browser-based online tool with nothing to download and no sign-up. Open the page, set how many you want, and copy your UUIDs — it works the same on desktop and mobile.