Remove Duplicate Lines
De-duplicate lines in any text list
What is Remove Duplicate Lines?
Remove Duplicate Lines is a free online text tool from Farvixo that lets you de-duplicate lines in any text list. It updates as you type and runs entirely in your browser, so the text is never transmitted. There is no length limit imposed by a server, no account and no cost — use it as often as you need.
How to use Remove Duplicate Lines
Paste or type into Remove Duplicate Lines. Nothing is sent anywhere — the text stays in your browser.
Pick the options you want. Remove Duplicate Lines updates the output as you type, so you can see the effect immediately.
Take the result to your clipboard or save it as a file. Unlimited use, no account needed.
Frequently Asked Questions
Why are duplicates not being removed?
Trailing whitespace, or a difference in case. "Email@site.com " and "email@site.com" are different strings to a computer. Enable trimming and case-insensitive matching and they collapse together as you expect.
Does it keep the original order?
Yes. The first occurrence of each line stays where it was and later repeats are removed, so a list you had already arranged deliberately is not reshuffled.
Can I see which lines were duplicated?
Yes — the count of removed lines is shown, and you can invert the operation to see only the duplicates. That is useful when duplicates themselves are the thing you are investigating.
How large a list can I paste?
There is no imposed limit. Processing runs in your browser, so lists of tens of thousands of lines are fine — the ceiling is your device.
Does it handle blank lines?
Blank lines are treated as duplicates of each other and collapsed, which tidies a list pasted from a document. You can preserve them if the spacing is meaningful.
What you can use Remove Duplicate Lines for
- Writers and students checking length against a word or character limit
- Cleaning up text pasted out of a PDF, email or spreadsheet
- Reformatting a list or block of copy before publishing it
- Comparing two drafts to see exactly what changed
Remove Duplicate Lines at a glance
- Tool
- Remove Duplicate Lines — Text Tools
- Purpose
- De-duplicate lines in any text list
- Input
- Text or values you enter directly
- Output
- Transformed text, ready to copy or download
- Processing
- In your browser — files are never uploaded to a server
- Price
- Free, unlimited, no account required
- Limitations
- Bounded by your device's memory and CPU rather than a server quota
Tips for better results
- Text pasted from Word or a PDF often carries invisible characters; clean it before counting or comparing.
- Character counts differ between platforms — some count emoji as one character, others as two.
- The result updates live, so you can adjust the input and watch the output rather than re-running the tool.
Common problems and how to fix them
The count does not match another tool
Tools differ on whether line breaks, trailing spaces and emoji count. Check which rule the platform you are targeting applies.
Formatting was lost on paste
This is a plain-text tool by design. Apply formatting after transforming the text in your editor.
Strange symbols appear in the output
The source contained smart quotes, non-breaking spaces or zero-width characters. Strip them first, then re-run.
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