Duplicate Line Remover
Remove repeated lines, keep order.
Your text never leaves your browser
Hides your text behind a privacy screen so no one nearby can read it. Your text stays in the box and keeps counting.Processed entirely in your browser. Nothing is uploaded.
About the Duplicate Line Remover
Duplicate Line Remover strips out repeated lines and keeps the first occurrence of each, preserving the original order. Toggle case-insensitive matching to treat "Apple" and "apple" as the same.
Perfect for cleaning lists — emails, keywords, IDs, or any newline-separated data. Your text never leaves your browser — everything is computed locally.
Common uses
- De-duplicating a list of emails or keywords.
- Cleaning exported data before import.
- Removing repeated entries from logs or notes.
Frequently asked questions
Does it keep the original order?
Yes. The first time a line appears it is kept in place; later duplicates are removed. Use the Text Sorter if you also want ordering.
Is matching case-sensitive?
By default yes, but there is a toggle to ignore case when comparing lines.
Are blank lines removed?
Repeated blank lines are de-duplicated like any other line, keeping the output tidy.