Duplicate line remover
Remove duplicate lines while keeping the first occurrence.
Input
Result
Inputs are processed in your browser and are not sent to the server. Privacy by design
How to use
- Remove repeated lines from keyword lists, logs, notes, IDs, URLs, and copied spreadsheet exports while keeping the first occurrence.
- The tool compares each line as text and returns a cleaned list, which helps before importing data or reviewing repeated items.
- Whitespace and capitalization can make two lines look different, so normalize text first when exact matching matters.
How it works
The tool compares each line as text and returns a cleaned list, which helps before importing data or reviewing repeated items.
Examples
- Deduplicate a keyword list before uploading it to a planning sheet.
- Remove repeated URLs from a crawl note.
- Clean copied IDs before comparing two lists.
FAQ
Does order change?
The first occurrence stays in place and later duplicate lines are removed.
Things to check
Whitespace and capitalization can make two lines look different, so normalize text first when exact matching matters.
Workflow tips
For best results, decide whether spacing and capitalization should matter before removing duplicates. If you are cleaning keywords, URLs, or IDs, trim extra spaces first so visually identical lines are matched. After cleaning, scan the first and last few lines to make sure the order still matches your original workflow.
Review checklist
A practical workflow is to paste the raw list, remove duplicate lines, then copy the cleaned list into a spreadsheet or planning document. If the list came from multiple sources, run a quick scan for spelling variants after deduplication. For URL lists, consider sorting or grouping afterward so related pages are easier to review.
Publishing note
When sharing the final list with another person, mention that duplicates were removed by exact line match. That small note prevents confusion if someone expected fuzzy matching or manual grouping.