How do I filter lines by keyword?

Paste your list into the input box, enter the keyword you want to filter by, and choose to either show or hide lines containing that keyword. You can enable case-sensitive filtering and see a count of matching lines.

Can I use case-sensitive filtering?

Yes, you can toggle case-sensitive filtering on or off. When enabled, the tool will match the exact case of your keyword. When disabled, it will match regardless of case.

Yes, completely. All processing happens in your browser. Your text is never uploaded to our servers and we don't collect or track any data.

Do I need to pay for this tool?

No, the tool is completely free. No registration, no payments, no hidden fees. Use it as much as you want.

Filter Lines by Keyword

Filter your list to show or hide lines matching a specific keyword. Choose case sensitive matching and see how many lines match.

Paste your list here (one item per line):

0 characters

Filter Options:

Keyword to search for:

Filter Action:

Show matching lines only Hide matching lines

Case sensitive (treat "Apple" and "apple" as different)

Filtered Result:

How to Use:

Paste or type your list in the input area (one item per line)
Enter the keyword you want to search for
Choose to show matching lines only or hide matching lines
Select case sensitive if you want exact case matching
Click "Filter Lines" to process your list
See the filtered result and count of matching lines
Click "Copy" to copy to clipboard or "Download" to save as a file

Options Explained:

Show matching lines only: Displays only lines that contain the keyword
Hide matching lines: Displays all lines except those containing the keyword
Case sensitive: When enabled, "Apple" and "apple" are treated as different. When disabled, case is ignored.

Keyboard Shortcuts:

Ctrl + Enter (or Cmd + Enter): Filter lines
Ctrl + C: Copy when output is focused

Related Tools:

Why Use the Filter Lines Tool?

Works instantly in your browser - no downloads needed
Completely free - no signup or registration required
No data collection or tracking - your data stays private
Include and exclude filter options
Case sensitive and case insensitive modes
Handles large lists instantly