Generates UUID v4 using your browser's Web Crypto API. Nothing is uploaded.
Generators
UUID Generator
Generate UUID v4 (GUID) identifiers with single or bulk creation, copy, and download — all in your browser. Free, fast, and built for a clean browser workflow.
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About this tool
This free UUID generator creates universally unique identifiers (UUID/GUID, version 4) using your browser's cryptographic randomness — ideal for database keys, API identifiers, test fixtures, and unique file names.
Generation runs entirely on your device with the Web Crypto API, so no values are ever transmitted to ShishwaLab servers and nothing is stored between sessions.
Toggle hyphens on or off to match the format your tooling expects, and generate a single value or a batch in one click.
Tips for better results
- UUID v4 is random, not time-ordered. If you need time-sortable identifiers, look for a UUID v7 tool; this one focuses on the widest compatibility of v4.
- Copy a single ID when you need just one, or copy the full list when seeding a database, config file, or spreadsheet.
- With hyphens on you get the standard 8-4-4-4-12 hex groups; with hyphens off you get a compact 32-character hex string.
- Because generation is browser-local, every run produces different values and nothing persists after you close the tab.
How to use
- 1 Choose how many UUIDs to create and whether to keep the hyphens.
- 2 Click Generate to create fresh identifiers.
- 3 Copy a single value or copy/download the entire list.
FAQ
Is this UUID generator free?
Yes. Generate as many UUID v4 identifiers as you need with no account, upload, or watermark.
What UUID version does it create?
It generates UUID v4 (random) using the browser's Web Crypto API, the most widely supported and recommended version.
Are my UUIDs stored or sent anywhere?
No. Everything is generated locally in your browser and is never uploaded to ShishwaLab.
Can I generate multiple UUIDs at once?
Yes. Set a count to create a batch, then copy or download the list as plain text.
Can I remove the hyphens?
Yes. Toggle the hyphens option to output compact 32-character hexadecimal identifiers.
Is a UUID unique enough to use as a key?
For everyday use, yes. UUID v4 has 122 random bits, making collisions vanishingly unlikely; pair with a primary key constraint as normal.