To remove repeated entries from a plain-text list, place one item on each line and keep the first occurrence of each unique entry. This approach removes duplication without alphabetically sorting the remaining items, so a carefully arranged list can retain its original sequence.
Prepare a safe working copy
Save the original before cleaning it. Use a sample without confidential customer details while checking the result. A duplicate-line tool compares text; it does not decide whether two different names refer to the same person or product.
Open the Tolibox duplicate line remover, paste your list, and select Process. In the English version, comparison ignores letter case and spaces around a line. Empty lines are removed too. There are no separate switches for those rules.
Try this five-line example
Enter these items on separate lines: Apple, Banana, Apple, banana, and Pear.
The result is three lines: Apple, Banana, and Pear, in that order. The second Apple is discarded. The padded lowercase banana matches the earlier Banana. The first retained line keeps its original spelling and surrounding spaces, if any.
Before copying the result, compare the first and last entries with your original. Check a few duplicates manually, especially if capitalization has meaning in your data.
Know what this does not clean
Product-12 and Product 12 remain different entries. Repeated words inside a sentence are not removed. A list of URLs also needs care because changing letter case can change the meaning of some URL paths.
Will the tool sort my list?
No. It preserves the order of the first appearances.
Can I use it for case-sensitive identifiers?
Avoid the English tool when upper- and lowercase versions must remain distinct. Use a workflow that explicitly supports case-sensitive comparison.
After reviewing the cleaned list, copy it into a new file rather than overwriting your only original.