RegEx Tester Online — OmniKit
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regex-tester

RegEx Tester & Evaluator

Interactive Regular Expression debugger with live match highlighting and quick presets.

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How It Works

1 Input regular expression

Draft your regex pattern and toggle matching flags (g, i, m, s).

2 Paste test sample

Provide sample test text to evaluate matching expressions against.

3 Inspect matches & capture groups

Enjoy live syntax highlighting, full matches, and indexed capture groups.

Frequently Asked Questions (FAQ)

Which RegEx dialect is supported?
It runs the native ECMAScript JavaScript regular expression engine with full modern feature support.
Does it offer quick pattern presets?
Yes, common templates (Email, URL, IPv4, Phone, Dates) are provided for instant testing.
Is execution protected against ReDoS locking?
Matches are calculated defensively to keep browser performance responsive.

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