What regex flavors does this tester support?

This regex tester uses JavaScript's built-in RegExp engine, which supports ECMAScript regex syntax including lookahead, lookbehind, named groups, and Unicode properties.

Does the regex tester show matches in real-time?

Yes, matches are highlighted in real-time as you type your pattern. You can instantly see which parts of your test string match the regex.

Can I test regex flags like global and case-insensitive?

Yes, you can apply all standard regex flags including global (g), case-insensitive (i), multiline (m), dotAll (s), and Unicode (u) flags.

正規表現テスター

リアルタイムマッチングとハイライトで正規表現をテスト・デバッグします。

パターン

//g

テスト文字列

使い方

リアルタイムマッチングとハイライトで正規表現をテスト・デバッグします。

1Enter your regular expression pattern in the pattern field.
2Set flags (global, case-insensitive, multiline) as needed.
3Type or paste your test string in the input area.
4Matches are highlighted in real-time as you type.

主な機能

Real-time regex matching with highlighted results
Support for all JavaScript regex flags (g, i, m, s)
Shows match count and captured groups
Quick reference for common regex patterns

よくある質問

詳しく読む

Regex Guide for Beginners — Master Pattern Matching