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Remove Duplicate Lines Online

Remove duplicate lines from any list of text, with options for case sensitivity, trimming, sorting, and removing empty lines.

Runs entirely in your browser — your files are never uploaded to a server.

Last updated

This tool runs entirely in your browser. Your text is never uploaded to our servers.

How It Works

1. Choose Your File

Drag & drop or select the file you want to work with.

2. Processed in Your Browser

Everything happens locally on your device — your file is never uploaded anywhere.

3. Download Your Result

Get your finished file instantly, ready to save or share.

About Remove Duplicate Lines Online

Cleaning duplicate entries from a list — email addresses, data exported from another tool, any line-by-line text — by hand is tedious and error-prone once a list grows beyond a handful of entries.

This tool identifies and removes exact duplicate lines, keeping only the first occurrence of each, producing a clean list without needing to manually scan for repeats.

Matching is exact — differences in capitalization or trailing whitespace are treated as different lines, worth knowing if your list has inconsistent formatting that should be treated as duplicates but technically isn’t identical text.

Frequently Asked Questions

How to remove duplicate lines from a text file?

Open the file in any editor, copy its contents, paste them into the box above and click Remove Duplicates. Copy the cleaned result back into your file. The tool works on pasted text only, so it does not upload or open files for you.

How to remove duplicate lines in Excel?

Copy the column from Excel and paste it here, since each cell becomes one line, then paste the result back. Excel also has its own option under Data, then Remove Duplicates. This tool is handy when you only need to clean a quick list.

How to remove duplicate lines in Word?

Word has no built-in command for this. Copy the lines, with one entry per paragraph, and paste them into the box above. The tool keeps the first occurrence of each line, and you can paste the cleaned list back into your document.

Does it keep the original order of my lines?

Yes. The first occurrence of each line stays in its original position and later copies are dropped. Order only changes if you tick Sort alphabetically. Case sensitive, Trim whitespace and Remove empty lines are separate options, so Apple and apple differ unless you untick Case sensitive.

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