Text Filter

Filter text lines by condition, supports contains, not-contains and regex matching.

Input Text

Filter Condition

Filter Mode

Use Regex

Case Sensitive

Invert (keep non-matching lines)

0 lines → 0 after filter

Filter lines by keyword or regex, keeping or excluding specified lines with case-sensitive and multi-condition support.

Paste text, enter filter keyword or regex, choose keep/exclude mode, view filter results.

Regex mode requires JavaScript regex syntax; empty keyword shows all lines.