Need help implementing this in a real project?
We help businesses with:
- Web Development
- Ecommerce Integrations
- Automation
- Technical SEO
A list pasted from a spreadsheet, a log file, or a merged export often has repeated entries scattered throughout, not conveniently grouped together - which makes them tedious to catch by eye. This strips repeated lines and shows exactly how many times each one appeared, so you can see how much duplication there actually was, not just the cleaned result.
When you'd use this
Deduping an email list before a mailmerge, cleaning up a SKU list merged from two sources, or removing repeated log lines before searching through them for a specific event.
Common errors
Two lines that look identical but aren't being caught as duplicates usually differ in trailing whitespace or capitalization - check whether the comparison needs to be case-insensitive for your specific list.
Frequently asked questions
Does this preserve the original order of the list?
By default yes - the first occurrence of each line is kept in its original position, with only the later repeats removed. There's a separate sort option if you want the deduplicated result alphabetized instead.
Related Utilities You Might Need
Case Converter
Transform written copy into camelCase, snake_case, Sentence case, or UPPERCASE with detailed readability metrics.
Line Sorter
Sort a list A to Z, by number, by length, reverse it, or shuffle the order at random.
Find & Replace
Replace text across a whole document at once, with whole-word matching and regular expression support.