Duplicate Text Remover
Clean up a list by removing repeated lines. Keep the first or last occurrence, ignore differences in case or spacing, and optionally sort what is left.
- Runs in your browser
- No sign-up
- Free to use
Repeated lines
How to use Duplicate Text Remover
- Paste your list, with one item per line, into the input box.
- Choose the matching rules: whether upper and lower case count as the same, and whether leading and trailing spaces are ignored.
- Pick any extras such as removing empty lines or sorting the result.
- The cleaned list appears immediately. Copy it or download it as a text file.
Duplicate Text Remover features
Order preserved
Unique lines stay in their original order unless you choose to sort them.
Flexible matching
Treat “Apple”, “apple” and “ apple ” as the same entry, or as different ones.
Keep first or last
Decide which occurrence of a repeated line survives.
Duplicate report
See which lines were repeated and how many times each appeared.
Sorting and cleanup
Sort A–Z or Z–A and remove blank lines in the same step.
Handles large lists
Hundreds of thousands of lines are processed in a moment, locally.
When to use Duplicate Text Remover
- De-duplicating an email, keyword or URL list.
- Cleaning data pasted from a spreadsheet column.
- Finding which entries in a log or export are repeated.
- Merging several lists into one without repeats.
Duplicate Text Remover FAQ
How does it decide two lines are duplicates?
Lines are compared as whole strings. With the default options, differences in upper and lower case and in leading or trailing spaces are ignored; you can turn either option off for an exact comparison.
Which copy of a duplicate is kept?
The first occurrence by default, so the list keeps its original order. Choose “Keep last occurrence” if later entries should take precedence, for example in a log.
Can it remove duplicate words within a sentence?
This tool works line by line. To de-duplicate words, put each word on its own line first.
Does it change the text of the lines it keeps?
With “Trim spaces” on, leading and trailing spaces are removed from the output lines. Otherwise lines are output exactly as entered.
Is there a size limit?
No fixed limit. Very large inputs depend on your device's memory.
Why duplicates creep into lists
Lists assembled from several sources almost always contain repeats: the same address exported from two systems, a keyword collected twice, a row copied when a spreadsheet was merged. The repeats are rarely identical character for character. One copy has a capital letter, another a trailing space left by a copy and paste, which is why a naive exact comparison misses them.
Normalising each line before comparing it, by trimming spaces and folding case, catches those near-identical entries while the output keeps the original spelling of the copy that is retained. The duplicate report is worth a glance: a line that appears many times can point to a problem in the process that produced the data.