Remove duplicate lines
Keep the first occurrence of each exact line and remove repeated copies from the output.
Remove duplicate lines: inputs, results and limitations
Keep the first occurrence of each exact line and remove repeated copies from the output.
How to use Remove duplicate lines
- Paste your text or use the example to inspect the operation.
- Run the tool once the input is ready.
- Inspect the preview or result, then download a new file.
An illustrative use case
The lines one, two, one reduced to one and two.
Sample input
one two one
What to inspect in the output
Review whitespace and capitalization when interpreting duplicates. Keep a source copy if repeated lines encode meaningful records; deduplication can discard those repetitions.
Where this tool stops
Review the output before using it. Your original input is not changed.
Troubleshooting Remove duplicate lines
Check the chosen operation and preserve a copy of structured input before transforming it. Compare a short sample first; case changes, line operations and reversal are different transformations.
Questions about Remove duplicate lines
Should I use this on structured CSV records?
Only when removing identical lines is genuinely the required operation. It does not understand CSV column identities, quoted multiline fields or record keys.
What input does Remove duplicate lines need?
Use the sample text shown below, then replace it with your own input. Review the result for the destination where it will be used.
Which options does Remove duplicate lines provide?
There are no extra settings in this version. Select or paste the appropriate input and review the produced result.
Your original input is preserved. Review the new output before using it in a published page, customer delivery or production workflow.
JavaScript enables the interactive workspace.