Remove Lines Containing
Delete the lines that contain a word, string or regex, or keep only those lines.
- Runs in your browser
- Free to use
About this tool
Remove Lines Containing is a grep for the browser: enter a string or a regular expression and either remove every line that matches or keep only those lines. It makes short work of filtering noise out of logs, dropping commented lines or isolating the entries that mention a host.
Combine it with the Regex Matches Extractor when you want only the matched parts.
How to use it — quick steps
- 01
Enter the lines
Type or paste the lines in the field above, one item per line. Use Ctrl + V to paste from the clipboard.
- 02
Adjust the options
Pick the settings that fit your case; the defaults work for most people. Changes apply instantly.
- 03
Press "Filter lines"
Press "Filter lines" or Ctrl + Enter. The result appears below in an instant. Results can be copied.
Key features of this tool
Nothing leaves your browser
The processing is plain JavaScript that runs on your device: the text you paste is never uploaded to our servers or to anyone else.
Instant results
Results appear the moment you press the button, even for long inputs, and every block has copy and download actions.
Works everywhere
No installation, no account and no limits: the tool works on desktop and mobile, in any modern browser, as often as you like.
Frequently asked questions
Can I use a regular expression?
Yes, enable the regex option; JavaScript syntax applies, for example ^\d{3} or (warn|error).
Does it match whole words?
It matches substrings. For whole words use the regex \bword\b.
Are my files or data uploaded?
No. The tool is plain JavaScript that runs in your browser; the files or data you provide here are never uploaded to our servers.