This tool removes duplicate lines from your text, keeping only the first occurrence of each. Clean up lists and exports instantly in your browser.
How to use it
- Paste your list with possible duplicates.
- Optionally enable case-insensitive matching.
- Copy the de-duplicated result.
About Remove Duplicate Lines
Duplicate lines creep into exports, logs and copy-pasted lists all the time. This tool keeps the first occurrence of each line and drops the rest, optionally ignoring case so 'Apple' and 'apple' are treated as the same. It preserves the original order of the lines it keeps. Everything runs locally in your browser, so even sensitive lists stay private.
FAQ
Does it keep the first or last duplicate?
It keeps the first occurrence and removes any later repeats, preserving order.
Can it ignore case?
Yes — enable the case-insensitive option to treat differently-cased lines as duplicates.
Are blank lines removed?
Blank lines are treated like any other line; repeated blanks beyond the first are removed.