Example strings
Each line becomes a sample input for pattern generation.
Email pattern
High confidence/^[^\s@]+@[^\s@]+\.[^\s@]+$/iMatch standard email-style addresses.
Smart Regex Builder
Regex for URL Validation
Generate and test regex for URLs — full links, domains, paths, and query strings — with a browser-based regex builder that explains the pattern.
- Generate from examples
- Test with live match highlights
- Copy for JS, TS, or Python
Quick modeAutosaves in this browser
Quick templates
Generated pattern
Use the generated regex as-is, or move it into test mode to tweak flags and cases.
/^[^\s@]+@[^\s@]+\.[^\s@]+$/igimsu
Live results
Generate, explain, and validate the pattern in one pass.
See the regex, what it means, and which test lines pass without digging through token noise.
Active regex
/^[^\s@]+@[^\s@]+\.[^\s@]+$/i3 lines • 3 matched • 0 unmatched
Pattern summary
Email pattern • High confidence
Match standard email-style addresses.
const regex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/i;
Match results
One row per test string
Case 1
Matchedalex@example.com✔ Full line matched.
Case 2
Matchedmaya@company.io✔ Full line matched.
Case 3
Matchedtest.user@site.dev✔ Full line matched.
What this regex matches
- Matches the full line from start to end.
- Requires text before and after @.
- Ignores letter case.
- Matches all 3 current test lines.
Show detailed breakdown
^Start of string
Match from the start of the string.
[^\s@]+One or more character outside sets
Match one or more character outside sets.
@@ symbol
Match the @ character.
[^\s@]+One or more character outside sets
Match one or more character outside sets.
\.Literal .
Match the literal character ..
[^\s@]+One or more character outside sets
Match one or more character outside sets.
$End of string
Match up to the end of the string.
Why it helps
Why generate URL regex with a builder
Match http and https links, bare domains, paths, and query strings without memorizing escape rules.
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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