Blank-line handling
Unique lines
Key takeaway
Paste one item per line to remove duplicates.
- Input lines
- 0
- Unique lines
- 0
- Duplicates removed
- 0
- Blank lines removed
- 0
How this duplicate line remover works
The tool compares each pasted line using the selected case and whitespace options, keeps the first matching line and removes later duplicates. It runs in your browser.
What counts as a duplicate
Matching is exact after the selected options. Case-insensitive mode treats uppercase and lowercase versions as the same, while trim mode compares lines after removing leading and trailing spaces.
What this tool does not include
It does not fuzzy-match similar lines, merge spreadsheet data or decide which duplicate is best.
Key terms and assumptionsShort notes about first occurrence, exact matching, blank lines and browser processing.
- First occurrence
- The first matching line is kept and later matches are removed.
- Exact matching
- Similar lines are not merged unless they match exactly after the selected case and whitespace options.
- Blank lines
- Blank lines can be removed or treated as one duplicate group.
- Browser processing
- The text is processed in the browser and does not need to be sent to a server.
Related tools
Browse the Text tools hub for more browser-based text tools.
- Alphabetical Order Tool Sort pasted lines alphabetically A-Z or Z-A with options to ignore case, trim whitespace and remove blank lines.
- Line Counter Count total lines, non-empty lines and blank lines in pasted text.
- Text Cleaner Clean pasted text by trimming whitespace, removing extra spaces, removing blank lines and normalising line breaks.
- Case Converter Convert text to uppercase, lowercase, sentence case, title case, camelCase, PascalCase, kebab-case or snake_case.
FAQs
How does this remove duplicate lines?
It compares each line using the selected case and whitespace options, then keeps the first occurrence.
Does it keep the first duplicate?
Yes. The first matching line is kept.
Can it ignore case?
Yes. Case-insensitive mode treats uppercase and lowercase versions as the same.
Can it remove blank lines?
Yes. Remove blank lines is enabled by default.
Does it find similar lines?
No. It only removes exact duplicates after the selected normalisation.
Is my text uploaded?
No. The tool runs in the browser.