Free online list deduplication tool. Quickly remove duplicates and keep unique values. Case-sensitive/insensitive options, preserve empty lines. No signup required.
Zero dependencies · Works offlineFree online list deduplication tool. Quickly remove duplicates and keep unique values. Case-sensitive/insensitive options, preserve empty lines. No signup required.
The tool reads input line by line, uses a hash set to detect duplicates, keeps only the first occurrence, and preserves original order.
When enabled, 'Apple' and 'apple' are treated as different. When disabled, they're treated as the same.
Completely safe. All processing is done locally in your browser — no data is uploaded.