Duplicate Line Remover
Remove duplicate lines from text and keep one clean copy of each line.
Input text
Paste up to 1000 lines, then run the cleanup.
Cleaned output
The output keeps the first version of each matching line.
Remove duplicate lines
Matching options
By default, the tool removes exact duplicate lines only and keeps the first occurrence in place. Spacing, capitalization, and hidden characters can affect whether lines match.
Run stats
Input
0
Unique
0
Removed
0
How to use
Follow these simple steps to use the tool.
Add up to 1000 lines into the input area. Each line is checked separately.
Click Remove Duplicate Lines to keep the first version of each unique line and remove later repeats using the matching options you selected.
Review the output, check how many lines were removed, and copy the cleaned text when you are done.
What it does
See what this free online tool can help with.
Removes exact duplicate lines by default while keeping the first occurrence in place.
Can preserve repeated blank lines and optionally ignore edge spaces or letter case.
Keeps the first version of each unique line and removes later repeats from the output.
Reports total input lines, unique output lines, and how many lines were removed in the current run.
Duplicate line removal tool runs in your browser, so your text stays on your device.
Supported formats and limits
Review supported inputs, outputs, and practical limits for this tool.
Formats and options
- Plain text pasted into the input area
- Up to 1000 lines per run
- Modern desktop and mobile browsers
Things to know
- By default, matching is exact. Punctuation, spacing, letter case, tabs, and hidden characters can affect whether lines count as duplicates.
- This tool keeps the first matching line and removes later duplicates only.
- Runs are limited to 1000 lines at a time.
FAQ
Answers to common questions about this tool.
Does this tool ignore punctuation or capitalization?
Not by default. Exact matching is used unless you turn on Ignore letter case. Punctuation and internal spacing still count as differences.
What happens if the same line appears with extra spaces at the start or end?
They are treated as different lines by default. Turn on Ignore leading and trailing spaces if you want edge spaces ignored during duplicate checks.
What is the limit per run?
You can process up to 1000 lines per run. If you paste more than that, the tool will ask you to shorten the input first.
Why use a duplicate line remover?
Duplicate line cleanup is useful when you are working with copied lists, exports, logs, or notes that need one clean copy of each line.
This Bukmrk tool is intentionally simple: it removes later duplicate lines, reports how much was cleaned, and runs in your browser so your text stays on your device. It also includes matching options for handling edge cases such as repeated blank lines, leading and trailing spaces, and letter case.