ApnaToolsDeveloper UtilitiesRegular Expression (Regex) Tester
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Regular Expression (Regex) Tester

Write, validate, and check regular expression patterns in real-time. Highlights match groups and includes a handy cheat sheet library.

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//gi
No query matches occurred. Verify your pattern guidelines or test entries.
Interactive Preset Cheat Sheet Library
Email AddressMatches standard internet email structures with group splits.
/([a-zA-Z0-9._%+-]+)@([a-zA-Z0-9.-]+)\.([a-zA-Z]{2,})/
Phone Number (US)Matches US phone layouts containing optional codes, dashes & spaces.
/\+?\d{1,3}?[- .]?\(?\d{3}\)?[- .]?\d{3}[- .]?\d{4}/
URL Link AddressCaptures internet links starting with HTTP or HTTPS.
/https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)/
Hexadecimal ColorFinds custom hex color components like #FFF, #ff55aa.
/#([a-fA-F0-9]{6}|[a-fA-F0-9]{3})/
IPv4 AddressValidates standard four-part IP addresses.
/(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/
4.8 / 50 votes

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Instructions / Manual & FAQs for Regular Expression (Regex) Tester

How-to: Using `Regular Expression (Regex) Tester` successfully

Evaluate regular expression engines in real-time. Check matching states on sample paragraphs, highlight matching string segments, and inspect capture group states.

Select sample templates, check capture groups, and copy clean, parsed expression lines.

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Frequently Asked Questions (FAQ)
Q: Does it support standard engines?

Yes, utilizes standard JavaScript RegExp capabilities built inside modern engines.

Q: Are cheatsheets customizable?

Yes, click any cheat block to overlay and review standard matching behaviors.

Q: Can I access this tool without internet?

Yes! Once apnaTools.com loaded, all calculation calculations take place client-side. You can disconnect completely and the tool remains fully operational.

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