Paste your text
Paste text into the input box—one item per line. Lists, logs, or any line-separated content work.
Remove Duplicate Lines
Remove duplicate lines from text instantly in your browser. Paste your list or log, choose options like case-sensitive or preserve order, and copy the de-duplicated output. Fast, free, and private.
Options
Results
Text is processed entirely in your browser and is never uploaded to any server.
How it works
How to Remove Duplicate Lines
Everything runs in your browser. No account, no software, no data leaving your device.
Set options
Choose case-sensitive matching, whether to preserve the original order, and whether to remove empty lines.
Click Remove duplicates
The tool de-duplicates in the browser and shows how many lines remain and how many were removed.
Copy the output
Copy the cleaned text to your clipboard for use in docs, code, or other tools.
Why use this tool
Why Remove Duplicate Lines?
Lists and logs often contain repeated entries. Removing duplicates keeps data clean and reduces noise without running scripts or uploading files.
Useful when you need to:
Clean lists and exports
Turn duplicated rows into unique entries for emails, IDs, or keywords.
Deduplicate logs
Remove repeated log lines while keeping order or sort for easier review.
No scripts or installs
Runs in the browser; no command line or spreadsheet formulas needed.
Case-sensitive or not
Match exactly or treat uppercase and lowercase as the same, depending on your data.
Privacy
Private and Secure
Your text is never uploaded to a server. This tool runs entirely in your browser using client-side processing.
Data stays on your device
Your data never leaves your browser. No uploads, no cloud storage, no logs.
Nothing stored or sent
No text is stored or transmitted. Processing happens only in memory.
Fast and private
De-duplication is instant and runs locally at full browser speed.
FAQ
Frequently asked questions
Paste your text (one item per line), set options like case-sensitive and preserve order, then click Remove duplicates. Copy the result from the preview.
When checked, the first occurrence of each line is kept and the order of lines is unchanged. When unchecked, unique lines are sorted alphabetically.
Yes. Processing runs locally in your browser. Nothing is uploaded or stored.
Yes. Check “Remove empty lines” and blank lines are stripped before de-duplication. Empty lines are not counted as duplicates of each other.