Regex tester
Build and debug regular expressions with real-time matching and detailed capture group explanations.
Advanced utility for web development and data engineering.
2 matches found
hello@example.com
Position 1:13
ops.team@test.org
Position 2:9
How this tool is meant to help
Build and debug regular expressions with real-time matching and detailed capture group explanations. This page keeps one task in focus so you can move from input to output without jumping between tabs.
Typical workflow
Start with clean source data, review the live result, and export only after the output matches your goal.
Quality checks
Look for edge cases, confirm the formatting, and compare the result with a related utility when you need a second pass.
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The expression recompiles on every keystroke so you can verify the pattern, flags, and replacement before using it in real code.
Live matching
Everything runs entirely in the browser and keeps your test text on the current device.
Capture groups
Numbered and named groups appear under each match so you can see exactly what was captured.