Keep Matching Lines
Keep only lines that match a pattern (text/regex). Everything runs on your device — fast, free, and never sent to a server.
The result will appear here…
or press Ctrl+Enter
Everything runs in your browser. Your data is never sent to our servers.
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Example
Example Input
cat dog catfish (pola: cat)
Example Output
cat catfish
How to Use
- 1Paste or type your text into the Input field.
- 2If the tool has "More settings", set them as needed.
- 3Click the button (or press Ctrl+Enter), then copy the result.
About Keep Matching Lines
Keep Matching Lines filters text, keeping only lines that contain your pattern — supporting plain text and regex.
Like the grep command. Great for extracting relevant log lines or data.
FAQ
Is my text sent to a server?
No. Keep Matching Lines runs entirely in your browser — the text you enter never leaves your device.