What is the difference between removing duplicate words vs duplicate lines? +
Removing duplicate lines deletes entire repeated lines from a list. Removing duplicate words scans within the text itself and removes individual words that appear more than once, keeping only the first occurrence. This is useful for cleaning keyword lists, fixing repetitive writing, or generating unique word sets from any content.
Does this tool remove duplicates across the whole text or per line? +
You can choose either mode. In whole-text mode, duplicates are removed across the entire text — if a word appears in line 1 and line 3, the second occurrence is removed. In per-line mode, duplicates are removed within each individual line independently, keeping the line structure of your text intact.
Will removing duplicate words break my text grammar? +
Yes, in natural prose removing duplicates can change the meaning and grammar. For example "the cat sat on the mat" would become "cat sat on mat" since "the" is removed after its first appearance. This tool is best used for keyword lists, tag lists, and comma-separated data where grammar does not matter.
Can I remove duplicate words case-insensitively? +
Yes. Enable the Case-insensitive option (on by default) to treat "Apple" and "apple" as the same word. The first occurrence with its original capitalization is kept, and subsequent occurrences regardless of case are removed. Disable this option if you want to treat differently-cased versions as separate unique words.