Developer Tools
Regex Tester & Visualizer
Test regular expressions with real-time match highlighting and capturing groups
Regex Tester & Matcher
Test patterns and capture groups in real time completely client-side.
//
Hello! Contact us at info@example.com or support@allfreetoolkit.org for assistance. Note that test.email@sub.domain.co is also valid, but webmaster@site is not.
Matches (3)
Global (g)
Ignore Case (i)
Multiline (m)
DotAll (s)
Match #1Index: 21
info@example.com
Match #2Index: 41
support@allfreetoolkit.org
Match #3Index: 94
test.email@sub.domain.co
About Regex Tester & Visualizer
Write and test regular expressions client-side with real-time match highlighting. Enter your pattern, flags, and test string to view matching ranges, count matches, and see capture group details.
Explains expression syntax error states instantly to help you debug regex patterns for JavaScript, Python, PHP, or Java coding tasks.
How to Use Regex Tester & Visualizer
- 1Type your regular expression pattern in the regex field.
- 2Select execution flags (g, i, m, s, u).
- 3Enter your test text to see highlights.
- 4Inspect the matches panel for indices and capture groups.
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