Duplicate Line Remover
Paste text and remove all duplicate lines in one click.
The Duplicate Line Remover strips repeated lines from any block of text, keeping only the first occurrence of each line. It is useful for cleaning up keyword lists, deduplicating spreadsheet exports, removing repeated log entries, or any task where you need only unique lines. All processing happens locally in your browser.
How to use
- Paste your text — one item per line — into the input area.
- Duplicate lines are removed automatically and the result appears instantly.
- Copy the deduplicated result from the output panel.
Deduplicated text will appear hereWhen to use
Cleaning keyword lists
SEO keyword lists gathered from multiple tools often contain repeated entries. Paste your combined list — one keyword per line — to remove all duplicates in a single step while preserving the original order.
Deduplicating email lists
Paste a list of email addresses to remove repeated entries before uploading to your email provider. For case-insensitive deduplication, convert to lowercase with the Text Case Converter first, then remove duplicates here.
Cleaning log output
Server logs and error reports often repeat the same line hundreds of times. Paste the log to collapse repetition and see each unique entry once — making patterns easier to spot.
Examples
Frequently Asked Questions
Is the comparison case-sensitive?
Yes. "Apple" and "apple" are treated as different lines. Use the Text Case Converter first if you need case-insensitive deduplication.
Does order matter?
The tool keeps the first occurrence of each line and removes subsequent duplicates, preserving the original order.
Can I remove blank lines too?
Empty lines are treated as duplicate lines — all but the first empty line are removed.
What is a practical use case for this tool?
Common uses: cleaning up a list of keywords copied from multiple sources, deduplicating email lists, or removing repeated entries from exported data files.
Is there a line limit?
No. The tool handles any amount of text. Large lists with thousands of lines are processed instantly.
Is the duplicate comparison case-sensitive?
Yes. "Apple" and "apple" are treated as different lines. For case-insensitive deduplication, convert all text to lowercase with the Text Case Converter first, then remove duplicate lines.
Does it keep the first or last occurrence?
The tool keeps the first occurrence of each line and removes subsequent duplicates, preserving the original order of the list.
Will it remove blank lines?
Blank lines are treated as lines — the first blank line is kept, and additional blank lines are removed. To remove all blank lines, use the Whitespace Remover instead.
Can I deduplicate words within a single line?
No — the tool compares whole lines. To deduplicate words within a line, put each word on its own line first, run the remover, then join the result back into one line manually.