Match http and https links, bare domains, paths, and query strings without memorizing escape rules.
Smart Regex Builder
Regex for URL Validation
Generate and test regex for URLs — full links, domains, paths, and query strings — with a browser-based regex builder that explains the pattern.
Test real links, domains, and edge cases before you copy the URL regex.
- Save regex patterns, flags, and test strings in one browser workspace
- Resume validation work later with matching and failing examples intact
- Share the exact regex workspace when you want review or handoff
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Regex studio
Generate regex from examples
Generate a regex builder workflow from sample strings, explain regex clearly, and use the built-in regex tester in the same workspace.
Example strings
alex@example.com maya@company.io test.user@site.dev
/^[^\s@]+@[^\s@]+\.[^\s@]+$/i^Start of string
[^\s@]+One or more non-space characters before the @
@An @ symbol
\.[^\s@]+A dot and a domain segment
$End of string
Why it helps
Why generate URL regex with a builder
Test tricky cases — subdomains, ports, trailing slashes, anchors — before the pattern reaches production.
Read a plain-English explanation so the URL rule is easy to adjust later.
How to use it
How to build a URL validation regex
1 Paste URLs that should match, from simple domains to full links with paths and parameters.
2 Add strings that should fail, like plain words or malformed protocols.
3 Review the generated pattern and explanation, then copy it into your validation or extraction code.
Quick tips
URL regex tips
A practical link matcher is https?:\/\/[^\s]+ for extraction; validation usually needs a stricter domain segment like [\w-]+(\.[\w-]+)+.
In JavaScript, prefer the URL constructor for strict validation and use regex for finding links inside larger text.
Decide early whether bare domains like example.com should pass — it changes the whole pattern.
FAQ
URL regex questions
Can this generate regex to match URLs in text?
Yes. Provide example links and the builder generates a pattern you can test against matching and failing strings for link extraction or validation.
Should the regex require http or https?
It depends on the input. Use https?:\/\/ when links always carry a protocol, and add an optional group if bare domains like example.com should also pass.
Is regex or the URL constructor better in JavaScript?
For validating one value, new URL() is stricter and simpler. Regex is better for finding multiple links inside text or enforcing a custom shape.
Can I test URL regex against edge cases?
Yes. Test subdomains, ports, query strings, and anchors as separate samples so you can see exactly which variants match.
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