Remove Duplicate Lines
Keep the first occurrence of each unique line.
● Runs locally in your browser. No file or text uploads.
Clean a repeated list
The lines a, b, a become a, b. The first occurrence stays in place. “A” and “a” remain separate.
When to use it
For reliable matching, remove unwanted spaces before deduplication. This tool deliberately preserves differences in capitalization and whitespace.
About this tool
Keep the first occurrence of each unique line. Use it without creating an account. Results are available immediately, and inputs are not saved between visits.
Does this send my input to a server?
Inputs are processed locally. Optional Analytics sends page statistics only after consent; tool inputs and files are excluded.