Regex Line Filter

Filter multiline text line by line with a JavaScript regex and choose whether to keep matching or non-matching lines.

Pattern

Flags

Keep

Input lines

Filtered lines

ReadyThe regex is tested independently against each line.

How to use this Regex Line Filter

Keep matching or non-matching lines using a regular expression. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.