RegexTester

Test regular expressions with live match highlighting

Download .exe

1.6 MB·Windows 10 / 11·64-bit

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About this tool

RegexTester lets you write and debug regular expressions against sample text with instant live feedback. Highlights all matches, shows capture groups, and provides clear error messages for invalid patterns.

Key features

✓Live regex matching as you type
✓Highlight all matches in the text
✓Capture group detail display
✓Support for flags: i, g, m, s, u
✓Error explanation for invalid patterns
✓Common pattern quick-insert library

✓Windows 10 / 11 (64-bit)

✓No installation required — portable .exe

✓Works fully offline after download

✓License key required to unlock after download

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