IPv4 Subnet Calculator
Network masks, wildcards, and host ranges.
Confirm an identifier fits standard UUID syntax.
Paste this into any page — the live tool appears with a credit link back here.
Validate a UUID string and identify its version and variant.
🔒 This tool runs entirely in your browser. Nothing is uploaded or stored.

Background reading: Uuid Checker on Wikipedia. More: all security & network.
Open the UUID Checker & Version Validator and use the controls in the workspace below: confirm an identifier fits standard uuid syntax. Results appear instantly in your browser, with nothing to install, sign up for, or pay for.
Yes. The UUID Checker & Version Validator is completely free, like every tool in the PrimeFreeTools library. There are no accounts, subscriptions, or usage limits.
No. The UUID Checker & Version Validator runs with JavaScript in your browser, so what you enter never leaves your device and nothing is stored on a server.
Validate a UUID string and identify its version and variant. You will find it grouped under Security & Network together with 13 other free tools on the PrimeFreeTools homepage.
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Sep 20, 2026
If you’ve ever needed to create a unique ID for a database record, API resource, user, transaction, file, or background job, you’ve probably encountered a UUID. You may…
Read postSep 17, 2026
Confirm an identifier fits standard UUID syntax.
Read post