Tiny Tiny Tools

Local browser utility

Duplicate-Line Remover

Paste line-based text to drop repeated lines while keeping the first occurrence, with options to trim whitespace, ignore letter case, and sort the result.

Your text is processed locally in your browser. We don't store or send your data anywhere.

0 lines

Matching options
Original lines
0

Lines you pasted in

Unique lines
0

Lines kept in the output

Removed
0

Duplicates taken out

Deduplicated linesPaste your lines above to see the result.

Your deduplicated lines will appear here.

Two lines count as the same only after the options above are applied. With Preserve order off, the kept lines come back sorted.

Questions About This Tool

Which duplicate is preserved?

The first occurrence supplies the output line. Later matching lines are removed.

Does Ignore case change the output to lowercase?

No. Case is normalized only for comparison; the first retained line keeps its spelling.

Are Windows line endings supported?

Yes. CRLF and CR are normalized before lines are compared.

Can I use this with CSV?

Only for simple one-value-per-line data. It does not parse delimiters, quotes, or multiline CSV fields.