Text & encoding
Duplicate Line Remover
Keep only the first instance of each line. Nothing you enter leaves your browser.
Your result will appear here.
What this tool does
About the Duplicate Line Remover
Keep only the first instance of each line. It is useful for preparing text for another system, inspecting an encoded value, or applying a repeatable cleanup step.
It is useful for preparing text for another system, inspecting an encoded value, or applying a repeatable cleanup step.
How to use it
- Paste lines in the input pane. Use the example button if you want to see the expected syntax.
- Comparison can be set to Case-sensitive, Ignore capitalization. Then select “Remove duplicates.”
- Inspect the result for warnings or structural differences, then copy it into the destination system.
Practical example
Start with a known input
Try this sample input: apple pear apple Select “Remove duplicates” and compare the result with the source before using it elsewhere.
What to know about the result
- Comparison can be set to Case-sensitive, Ignore capitalization.
- Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.
Common questions
Using the Duplicate Line Remover
Is the Duplicate Line Remover free to use?
Yes. FormatCalc's Duplicate Line Remover is free to use with no account required.
Is my data private when I use the Duplicate Line Remover?
Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.
How do I use the Duplicate Line Remover?
Paste or type your input, select any available options, and choose Remove duplicates. You can then copy the result.
What should I check before using the result?
Comparison can be set to Case-sensitive, Ignore capitalization. Processing happens in this browser. Your entered text and selected files are not sent to FormatCalc for conversion.