UUID Generator
FreeGenerate unique UUIDs (v4) for use in databases, APIs and software
Options
About UUID Generator
When two records must never collide, a plain auto-increment number is not enough, you need something globally unique. UUIDs solve this by giving every item a long, random identifier that is practically guaranteed not to repeat, which is why they show up in databases, APIs, and distributed systems everywhere. This tool generates version 4 UUIDs on demand.
Click to generate and you get a fresh, standards-compliant v4 UUID ready to copy into your schema, config file, or test data. It runs in your browser at no cost, with no signup and no limits to slow you down. Generate one or many as you build, knowing each value is random and unique, without any setup or account.
Common uses
- Creating a unique primary key for a new database record during development
- Seeding test data with distinct IDs that will not clash across runs
- Generating a correlation or request ID to trace a call through services
- Assigning a stable identifier to a file, session, or object in your app
- Filling in a UUID field while writing API documentation or examples
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- 100% Free — no account needed
- Works in your browser — no software required
- Instant results
- Secure and private
- No data stored
- Simple to use
FAQ
What version of UUID does this generate?
It produces version 4 UUIDs, which are based on random values and are the most common choice for general-purpose unique IDs.
Could two generated UUIDs ever be the same?
The chance of a collision is astronomically small, which is the whole point of v4 UUIDs. For practical purposes you can treat them as unique.
Are the UUIDs safe to use in production?
Yes, they follow the standard v4 format and are valid for databases, APIs, and any system that expects a UUID.
Can I use UUID Generator on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.