Got repeated lines cluttering up your data? Gone in one click.
Paste in your text, and this tool scans every line, finds the repeats, and keeps only the first occurrence of each unique entry. The order stays intact. You also get a count telling you exactly how many duplicates it found, so if you started with 100 lines and 15 were repeats, you’ll see “15 duplicates removed” and walk away with 85 clean lines.
Here’s what it does
- Keeps the first occurrence of every line, removes the rest
- Optional case-insensitive mode: treats “Apple” and “apple” as the same line
- Tells you how many duplicates were stripped
- Handles large blocks of text without breaking a sweat
- One-click copy for the cleaned result
- Runs in your browser. Nothing gets sent anywhere.
How to use it
Paste your text. Toggle case-insensitive mode if you need it (handy for messy exports where capitalization is inconsistent). Click “Remove Duplicates.” Done.
Quick example: you’ve exported an email list from your CRM and there are dozens of duplicates mixed in. Paste the whole thing here, hit the button, and you’ve got a clean list ready for import. Saves you from doing a tedious manual scan or writing a quick script.
Real-world scenarios
Cleaning CSV exports: before importing data into another system, paste it here to strip out repeated rows. I’ve caught duplicates this way that would’ve caused conflicts during import.
Log file analysis: server logs are full of repeated entries. Remove duplicates to focus on unique events, then run the result through the Text Sorter if you want them organized.
Email list hygiene: nobody wants to send the same newsletter to someone three times. Paste your list, deduplicate, import.
Code cleanup: duplicate import statements, repeated CSS declarations, redundant config entries. Paste the relevant section, clean it up, paste it back.
Tag and keyword lists: content management systems love accumulating duplicate tags over time. This cleans that up fast.
If you need more than just deduplication, like seeing how many times each line appeared, check out the Duplicate Finder in the data section. And if blank lines are also cluttering things up, the Empty Line Remover handles that.
Questions
Does it keep the original order?
Yes. The first time a line appears, it stays in place. Every subsequent copy of that line gets removed. The remaining lines keep their relative positions.
What does case-insensitive mode do exactly?
It makes “Hello”, “hello”, and “HELLO” count as the same line. Only whichever appears first survives. Turn this off if capitalization differences actually matter in your data.
What about lines with trailing spaces?
The comparison is exact. “Hello ” (with a trailing space) and “Hello” (without one) are treated as different lines. If that’s causing issues, run your text through the Text Trimmer first to normalize whitespace.
Is it safe for sensitive data?
Yes. Everything runs client-side in your browser. Your text never touches a server.