URL Validator
URL Validator — Free Online Tool
Validates a URL against the URI generic syntax (RFC 3986), checking the scheme, authority, path, query, and fragment, with optional enforcement of allowed schemes, default-port matching, and punycode host detection — useful for validating user-submitted links, crawling seeds, and API endpoint linting.
How to use the URL Validator
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the URL Validator free to use?
Yes. The URL Validator is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the URL Validator upload my data?
No. The URL Validator processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the URL Validator work offline?
After the page loads, the URL Validator runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this URL Validator
The URL Validator runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.