DevToolsmith

Remove Lines Containing

Filter out complete lines containing a literal phrase, with optional case folding.

Runs 100% in your browser — nothing is uploaded

Input
Tip: drop a file here56 chars · 56 bytes · 4 lines
Literal text to find
Tip: drop a file here5 chars · 5 bytes · 1 line
Result
0 chars · 0 bytes · 0 lines

Up to 200,000 input characters and 2 million output characters. Processing stays on this device.

Use Remove Lines Containing

Filter out complete lines containing a literal phrase, with optional case folding. Start with the sample, select the options and run the tool. Copy or download the result after reviewing it.

Behavior and limits

The search phrase is literal text rather than a regular expression. An empty phrase is rejected to prevent accidentally removing everything. The original order of retained lines is preserved; output uses LF line endings.

Example input

INFO ready
DEBUG details
ERROR failed
DEBUG another line
Literal text to find
DEBUG

Expected behavior for the example

INFO ready ERROR failed

Check important output in the application that will consume it. Use the tool directory to find related formats and tasks.

Frequently asked questions

How does Remove Lines Containing handle my input?

The search phrase is literal text rather than a regular expression. An empty phrase is rejected to prevent accidentally removing everything. The original order of retained lines is preserved; output uses LF line endings.

Is my input uploaded or saved automatically?

Processing runs locally in this browser. Input and results are not saved automatically. Downloads happen only when you choose them. The static preview blocks scripts and external resources when one is available.