Text Tools
Remove Lines Containing
Filter pasted text by deleting lines that contain unwanted text.
Last updated: May 29, 2026
Client-Side Processing
Input Data Stays on Device
Instant Local Execution
Find this tool useful? Support the project to keep it free!
Buy me a coffeeWhat is Remove Lines Containing?
Remove Lines Containing compares each line against a plain-text query or regular expression. Matching lines can be removed, or the tool can invert the filter and keep only matches.
How to Use Remove Lines Containing
1
Paste line-based text.
2
Enter the word, phrase, or regex to match.
3
Choose matching options.
4
Copy the filtered output.
Common Use Cases
- Removing DEBUG lines from logs.
- Filtering comments from config files.
- Keeping only lines with a SKU or domain.
- Cleaning keyword lists by pattern.
Example Input and Output
Input
INFO ok
DEBUG cache
ERROR failedOutput
INFO ok
ERROR failedFrequently Asked Questions
Can it use regular expressions?
Yes. Enable regex mode and enter a JavaScript regular expression pattern.
Can I keep only matching lines?
Yes. Enable keep-only mode to invert the filter.
Is my text sent to a server?
No. Filtering runs locally in your browser.
Related Tools
Delimited Text Extractor
Extract a column from comma, tab, semicolon, pipe, whitespace, or custom-delimited text.
Remove Duplicate Lines
Remove repeated lines from text with case sensitivity, whitespace trimming, sorting, and copyable output.
Remove Empty Lines
Remove blank lines from pasted text while preserving the remaining line order and content.
Alphabetic Order
Sort lines, words, or comma-separated items alphabetically with case, duplicate, and direction options.
Calculate String Length
Count string characters, Unicode code points, UTF-8 bytes, words, lines, paragraphs, sentences, and whitespace.
All Numbers Converter
Convert an integer between binary, octal, decimal, hexadecimal, and Base36 in one view.