Text Tools / Duplicate Line Remover
Duplicate Line Remover
Remove duplicate lines from a list while keeping the first occurrence and original order — instantly in your browser.
Text Tools / Duplicate Line Remover
Remove duplicate lines from a list while keeping the first occurrence and original order — instantly in your browser.
Duplicate Line Remover strips repeated lines out of a list — emails, URLs, tags, log lines, anything one-per-line — while keeping the first occurrence of each and preserving the original order. It's built for cleaning up lists pasted from spreadsheets, exports, or scraped data where the same value shows up more than once. Everything runs locally in your browser as you type; nothing you paste is ever sent to a server.
Paste or type your list
Drop your list into the input above, one item per line. There's no minimum or maximum length.
Choose your matching rules
Toggle "Case sensitive" off to treat "Foo" and "foo" as duplicates, "Ignore whitespace" on to treat lines that only differ by leading/trailing spaces as duplicates, and "Remove blank lines" to drop empty lines entirely.
Copy the result
The deduplicated list updates live below — use Copy result to grab it, or Clear to start over.
The first occurrence. Later duplicates are removed and the rest of the list keeps its original order.
No. Deduplication doesn't change the order of the remaining lines — use a dedicated Sort Lines tool if you also want to sort.
No. All processing happens locally in your browser as you type. Your text is never uploaded, logged, or stored.