Duplicate Line Remover Documentation

Remove duplicate lines from a block of text while preserving the original order of first occurrences.

SiteIndex compares each line against the lines already seen and keeps only the first occurrence, with an option to ignore case and trim whitespace before comparing.

• Clean up a mailing list or keyword list that has repeated entries.
• Deduplicate a list of URLs before bulk-processing them.
• Merge two lists and remove any lines that appear in both.

Input

Text, files, or values entered in the browser, depending on the tool.

Output

A result shown in the browser that can be reviewed or copied where supported.

• Blank lines are dropped. Comparisons trim surrounding whitespace, but the retained line keeps its original spelling and whitespace.

Inputs for this browser-side tool are processed locally and are not sent to SiteIndex. Normal page analytics may still be collected as described in the Privacy Policy. Read the Privacy Policy.