Line filter by substring

Remove or keep lines containing the specified text. Configure the filtering options below

Leave empty to work only with empty lines
Filter mode
Additional options

How does the substring line filter work?

This tool allows flexible filtering of text data according to specified criteria:

Main functions
  • Two operating modes - remove or keep lines by keyword
  • Remove empty lines - automatic removal of lines without content
  • Case sensitive - exact match of upper/lower case letters
  • Flexible customization - combine parameters for the desired result
Examples of use
  • Cleaning logs from system messages
  • Filtering lists by keywords
  • Remove empty lines from CSV files
  • Extracting necessary data from text

How to use the tool:

  1. Enter text for processing in the text field
  2. Specify the substring to filter by (or leave empty to work only with empty lines)
  3. Select mode: remove or keep lines containing the substring
  4. Configure additional options (case sensitivity, remove empty lines)
  5. Click "Process text" and get the result
Tip: For maximum accuracy, use the "Case-sensitive" option. For example, "Error" and "error" will be treated as different substrings.