Skip to content
TechToolsHQ
NewsReviewsGuidesTech 101Tech SeriesToolsNewsletter
TechToolsHQ

Independent, research-driven tech coverage — breaking news, in-depth reviews, buying guides, and technical tutorials to help you understand and choose with confidence.

Explore
NewsReviewsGuidesTech 101Tech SeriesFree Tools
Legal
About UsOur AuthorsContact UsPrivacy PolicyTerms of ServiceCopyright & DMCAAffiliate DisclosureEditorial PolicyAdvertise With Us

© 2026 TechToolsHQ. All rights reserved.

Tools / UUID generator

UUID generator

Produces RFC 4122 version 4 UUIDs using the browser’s cryptographic random source — the same quality of randomness you would get server-side, with none of the round trip.

Runs entirely in your browser

Loading tool…

About this tool

UUIDs are 128-bit identifiers used to label records, requests and resources uniquely without a central authority. This generator produces RFC 4122 version 4 (random) UUIDs, and can generate them in bulk when you need many at once.

It uses the browser’s cryptographic random source, so the identifiers have the same quality of randomness you would get generating them server-side — with none of the round trip. Version 4 UUIDs are random enough that collisions are, for practical purposes, never a concern.

It runs in your browser, so generation is instant and offline. Use it to seed test data, create identifiers for new records, or grab a unique value whenever you need one.

Frequently asked questions

What is a version 4 UUID?
A UUID generated from random data, defined by RFC 4122. It needs no coordination between systems and has a negligible chance of collision.
Can I generate many at once?
Yes. It supports bulk generation, so you can produce a batch of UUIDs in one go.
Are these UUIDs cryptographically random?
They use the browser’s cryptographic random source, giving the same randomness quality as server-side generation.
Is a UUID the same as a GUID?
Effectively yes. GUID is Microsoft’s term for the same 128-bit identifier concept; the version 4 UUIDs here are interchangeable.

Enjoying UUID generator?

TechToolsHQ is an independent, reader-supported tech platform. If this free tool saved you time, solved a problem, or helped your workflow, consider supporting our work. Your support helps us keep our utilities 100% free, private, and ad-free for everyone.

100% optional · Reader supported · Independent researchSupport our work

Related tools

  • JWT decoderInspect a JSON Web Token’s header, payload and expiry.
  • Number base converterConvert between binary, octal, decimal and hexadecimal.
  • Regex testerTest a regular expression against sample text and see every match.
  • URL slug generatorTurn a title into a clean, lowercase, hyphenated URL slug.
  • CSV to JSON converterConvert between CSV and JSON, both directions.
  • Image to base64 data URIInline an image into CSS, HTML or an email.

Browse all tools