UUID Validator
FreeValidate whether a string is a valid RFC-4122 UUID
About UUID Validator
A UUID looks like a random jumble of letters, numbers, and dashes, which makes it easy to miss a typo or a malformed value by eye. The UUID Validator checks whether a string is a proper RFC-4122 UUID, so you can confirm an identifier is correctly formatted before it causes a problem downstream.
Paste in the value and the tool tells you whether it's valid, checking the structure and format against the standard. It all happens in your browser, instantly and for free, with no signup. Your input isn't sent off or stored anywhere you'd worry about, making it a quick, private check when you're debugging an API response, a database record, or any system that relies on UUIDs.
Common uses
- Verifying a UUID returned by an API before using it in a request
- Checking IDs in a database export for malformed values
- Debugging why a system rejects an identifier you expected to work
- Confirming a generated UUID matches the RFC-4122 format
- Validating user-supplied IDs in a form or config file
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
Which UUID versions does it accept?
It validates against the RFC-4122 format, so standard UUIDs (including the common version 4) are recognized. It checks structure, not which version generator created it.
Does it tell me if the UUID exists in a system?
No. It only checks whether the string is correctly formatted, not whether it points to a real record anywhere.
Is my input sent to a server?
The check is about format validation only, and nothing you paste is stored. It's meant to be a fast, private lookup.
Can I use UUID Validator on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.