Is order preserved?
Yes, the first occurrence remains in its original position.
Cleanup · Browser processing
Remove Duplicate Lines Without Uploading Text
Clean lists, exports and copied datasets in your browser. The original order is preserved unless you choose otherwise.
Remove Duplicate LinesRuns on this device
The workspace does not submit its text or selected local file to TXTNimble. Refreshing or closing the page clears the current result.
Common questions
How this tool behaves
Can matching ignore case?
Yes. Turn off case-sensitive matching.
What happens to blank lines?
You can keep one blank line or remove blank lines.
Practical examples
When to use it
Email list
Remove repeated entries before importing.
Keyword list
Keep one copy of each line while preserving priority order.
Continue the workflow
Related tools
Remove Extra Spaces
Collapse repeated spaces, trim lines and remove unnecessary blank lines in one local pass.
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Replace plain text or regular-expression matches with case-sensitive and global controls.
CSV and TSV Viewer
Preview comma, tab or semicolon separated text, detect columns and export a cleaned CSV locally.