Remove Duplicate or Blank Lines
Clean up lists by removing duplicates, blanks, and trimming whitespace.
How it works
- Paste your list (one item per line) into the input area.
- Toggle options: case-insensitive matching, trim whitespace, and remove blank lines.
- Deduplicated output appears on the right with a count of how many lines were removed.
Common use cases
- Cleaning email lists before importing to a CRM.
- Deduplicating URLs scraped from multiple sources.
- Removing duplicate rows from a CSV column pasted as plain text.
- Sanitising keyword lists for SEO research.
Frequently asked questions
Does this preserve the original line order?
Yes. The first occurrence of each unique line stays in its original position. Later duplicates are removed.
Are 'Apple' and 'apple' treated as duplicates?
Only if case-insensitive matching is enabled. By default they are different lines.
Does this remove leading or trailing spaces?
Only if 'Trim whitespace' is enabled. With trim on, ' apple ' and 'apple' are treated as duplicates.
Is there a line limit?
There is no hard limit. The tool runs in your browser, so very large lists (millions of lines) may be slow depending on your device.
Related tools
Other free text utilities from Your Daily Text Kit.