Remove Duplicates
Remove duplicate lines from text.
About Remove Duplicates
Remove Duplicates scans your text and keeps only the first occurrence of each line, discarding any repeated lines. This is useful for cleaning up lists of emails, hostnames, keywords, or any deduplicated dataset before further processing. You can choose whether the comparison is case-sensitive or not.
Related Tools
Frequently Asked Questions
Is Remove Duplicates free?
Yes, completely free. No signup, no account, no usage limits. Use it as much as you need.
Is my data secure?
All processing happens directly in your browser using JavaScript. Your data is never sent to any server, stored, or shared. It stays entirely on your device.
Does it preserve the original order of lines?
Yes. The first occurrence of each line is kept in its original position; only subsequent duplicates are removed.
Are blank lines treated as duplicates of each other?
Yes. If you have multiple consecutive blank lines and want only one, the tool will consolidate them. You can also use Whitespace Cleaner to remove all blank lines.