Remove Duplicate Lines from Text
Remove repeated lines from a text list. Processing for supported tools happens locally in your browser.
About Remove Duplicate Lines
Use this browser-based utility for everyday tasks. Review output before relying on it and retain a copy of important originals.
Read the Remove Duplicate Lines guide →About Remove Duplicate Lines
Duplicate line removal helps clean copied lists, repeated identifiers or simple text records. Review the output because exact matching may treat capitalization or extra spaces as different values.
How to use Remove Duplicate Lines
- Paste the line-based text into the input box.
- Run the duplicate-removal action.
- Compare the output with the source and confirm the intended order is preserved.
- Check similar lines that differ only by capitalization or whitespace.
- Copy or download the cleaned result only after review.
Limits
Only lines that match under the chosen settings are removed. Lines that are similar but not the same, such as a different spelling, stay in the list. Keep the original list until you have checked the result, and do not use a text tool instead of a database rule when you must guarantee unique identifiers. Sorting the list first with Sort Lines makes near-duplicates easier to see.
Frequently asked questions
Does this remove lines that look similar?
It removes repeated lines according to the current text comparison behavior; similar but non-identical lines may remain.
Can I restore removed lines?
Use the original text, so keep a backup before processing an important list.
Does it keep the first or the last copy?
The first. Later copies are removed and the order of the other lines does not change.
Will Ali and ali be treated as duplicates?
Only if you switch on Ignore letter case.
More Text tools
- Word Counter: Count words in a text passage
- Character Counter: Count characters with or without spaces
- Case Converter: Change text to upper, lower or title case
- Text Cleaner: Clean repeated spaces and formatting from text
- Reading Time Calculator: Estimate how long a passage takes to read
- Sort Lines: Sort lines alphabetically
Want more detail, examples and answers to common questions? Read the Remove Duplicate Lines guide.