Keep Lines Containing
Keep only lines that contain specific text
Input Text
Paste or type your text here
Options
Output Text
Processed text will appear here
How It Works
Keep only lines that contain specific text
Keep only lines that contain a specific word or string, discarding everything else. The opposite of "Remove Lines Containing" — this tool acts as a grep-style filter, extracting matching lines from logs, data files, or any multi-line text.
Key Features
- ✓Keeps only lines matching a search string
- ✓Case-sensitive and case-insensitive options
- ✓Multiple search strings support
- ✓Shows count of matching lines
How to Keep Lines Containing Text
- 1
Paste your text
Enter multi-line text to filter.
- 2
Enter search string
Type the word or string to keep lines for.
- 3
Copy matching lines
Click copy for only the lines containing your string.
Common Use Cases
- •Extracting error lines from large log files
- •Filtering CSV rows that contain specific values
- •Finding all lines mentioning a keyword in a document
- •Isolating specific entries from configuration files
Frequently Asked Questions
Is this like grep?▼
Yes. It works similarly to the Unix grep command, showing only lines that match the search string.