Online GUID & UUID Generator

FriendlyGUID is a free online GUID generator that creates secure random identifiers and human-readable UUID patterns in your browser. Generate fresh IDs, validate existing GUIDs, and copy them without any data ever leaving your device.

Use the tool below as a random GUID generator, GUID validator, or readable UUID creator for testing, debugging, and documentation.

aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa
Tab to auto-complete the GUID. Press Enter to generate a new one.

Pro tip: toggle uppercase output, auto-complete with Tab, or press Enter to spin up a new random GUID. Every identifier follows the RFC 4122 format, so you can paste it directly into code or database seed scripts.

Why developers choose FriendlyGUID

Built for engineers, FriendlyGUID combines an instant GUID validator with flexible generation options. Whether you need a fast UUID generator online, a free GUID generator for QA environments, or a human-friendly pattern for test fixtures, this tool has you covered.

Readable GUID presets

Generate GUIDs with recognisable sequences that stand out in logging pipelines and failing test output. FriendlyGUID highlights repeating characters so you can spot identifiers at a glance.

Built-in GUID validator

Paste any UUID to check it instantly. Invalid characters are corrected on the fly, and the validator confirms the canonical 8-4-4-4-12 structure for both lowercase and uppercase output.

Fast random UUID generator

Spin up cryptographically unique version 4 UUIDs that are ready for API tokens, database keys, or distributed systems. Everything happens locally, so there is no rate limit and no wait time.

Random vs. readable identifiers

FriendlyGUID ships with curated examples so you can compare a standard random UUID against a readable GUID pattern. Use random identifiers for production workloads and human-friendly versions when you prioritise clarity.

Standard random UUID

f47ac10b-58cc-4372-a567-0e02b2c3d479

Highly secure but harder to recognise in logs.

Readable Friendly GUID

11111111-1111-1111-1111-111111111111fa1efa1e-fa1e-fa1e-fa1e-fa1efa1efa1eAAAA2222-BBBB-4CCC-8DDD-333333333333

Great for demos, QA, and documentation where readability matters.

How to generate a GUID online

  1. Click the input field and press Enter to generate a fresh random UUID.
  2. Toggle the keyboard icon to switch between lowercase and uppercase output depending on your code style guidelines.
  3. Use the copy button to place the identifier on your clipboard, or press Tab to auto-complete a partial GUID when validating data.
  4. Need a readable GUID generator? Replace characters with your own memorable pattern and FriendlyGUID will keep the format valid.

GUID & UUID basics

A GUID (or UUID) is a 128-bit number formatted as 8-4-4-4-12 hexadecimal segments. They are globally unique identifiers commonly used as primary keys, correlation IDs, cache busting tokens, and distributed system references.

FriendlyGUID focuses on RFC 4122 version 4 UUIDs, which rely on randomness for uniqueness. Future updates will cover sequential version 7 UUIDs and namespace-based version 5 UUIDs so you can choose the strategy that fits your workload.

Because the tool is browser-based, it is an ideal companion when you need a quick GUID generator online without installing CLI tools or depending on third-party APIs.

Popular use cases

  • Seeding databases with predictable yet unique identifiers for demos.
  • Creating readable GUIDs for unit, integration, and snapshot tests.
  • Generating random UUIDs for API keys, device identifiers, and cloud resources.
  • Validating GUID strings before storing them in queues or document stores.

Language quick tips

Prefer generating UUIDs in code? Combine FriendlyGUID with built-in language utilities:

JavaScript

crypto.randomUUID()

Python

import uuid\nuuid.uuid4()

C#

Guid.NewGuid().ToString()

SQL Server

SELECT NEWID();

Frequently asked questions

Is GUID generation secure and private on FriendlyGUID?

Yes. All GUID and UUID generation happens entirely in your browser using client-side JavaScript. Nothing you create is stored, logged, or sent to a server, so every identifier stays private.

Can I validate an existing GUID or UUID?

The built-in GUID validator checks every character as you type. Paste or type any identifier to confirm the format instantly, or tab to auto-complete a partially written GUID.

When should I use readable GUIDs instead of random ones?

Readable GUIDs use repeating patterns that stand out in logs, dashboards, and unit tests. They are perfect for debugging, while random GUIDs remain best for production secrets and unique identifiers.

What's the difference between GUID and UUID generators?

GUID (Globally Unique Identifier) and UUID (Universally Unique Identifier) describe the same RFC 4122 standard. FriendlyGUID can output lowercase or uppercase identifiers in the familiar 8-4-4-4-12 format.

Can I use the generated GUIDs in production applications?

Absolutely. Random GUIDs generated here follow the RFC 4122 version 4 specification and are safe for APIs, databases, and background jobs. Readable presets are best suited for development and QA environments.