🔎Regex Tester

Test regular expressions with flags, see matches and groups, and try replacements. All processing runs locally.

How this tool works

Enter a pattern

Write the regex pattern to test.

Select flags

Toggle g, i, m, s, u, y to control behavior.

Paste test text

Provide sample input to match against.

Review matches

See all matches and capture groups immediately.

Preview replacements

Try replacements using $1, $2, and more.

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