Ready to deduplicate
Paste lines on the left — output appears here instantly// paste text → remove duplicate lines instantly
Remove duplicate lines from any text instantly. Keep first, keep last, or count occurrences. Ignore case and whitespace options. Browser-based, free, no sign-up required.
Ready to deduplicate
Paste lines on the left — output appears here instantlyType or paste any text — one item per line — into the input area.
Choose whether to keep the first or last occurrence, sort output, and toggle case/whitespace handling.
The output updates live. Copy to clipboard or download as a .txt file in one click.
Duplicate Line Remover scans every line of your input and keeps only the first (or last) appearance of each unique line. The Show count mode also lets you see exactly how many times each line appeared — useful for frequency analysis of lists, logs, or datasets.
When a line appears multiple times, Keep first retains the line at its earliest position and removes all later repeats. Keep last does the opposite — it keeps the final appearance and removes everything before it. Both produce the same unique set, just with different line positions.
Instead of simply removing duplicates, Show count prefixes every unique line with how many times it appeared — e.g. 3× apple. This is useful for frequency analysis, ranking keyword lists, or auditing log files.
Yes. When Ignore case is enabled, comparison is done in lowercase, so Apple, APPLE, and apple are all treated as the same line. The output preserves the original casing of the kept occurrence.
No. All processing runs entirely in your browser using JavaScript. Your text never leaves your device and nothing is stored or logged anywhere.
With Trim whitespace enabled, leading and trailing spaces are stripped from each line before comparison. So apple and apple are treated as duplicates of apple. The output still preserves the original spacing of the kept line.
Yes — enable the Remove blank lines toggle and all empty or whitespace-only lines will be filtered out along with duplicate content lines. This is handy for cleaning up pasted data that has extra empty rows.
Duplicate Line Remover is a free, browser-based tool that instantly scans any text and removes every repeated line, leaving only unique entries. Whether you're cleaning up an email list, deduplicating a keyword spreadsheet, stripping repeated log entries, or preparing data for import, this tool handles it in a single paste — no sign-up, no file upload, nothing sent to any server.
When a line appears more than once, you choose which occurrence to retain. Keep first preserves the original order of first appearances — ideal when you want the output to reflect the natural sequence of your data. Keep last is useful when later entries are more recent or authoritative, such as in log files where the most recent value of a setting should win.
Instead of silently removing duplicates, Show count mode annotates each unique line with its total occurrence count. The output lists every unique line prefixed by how many times it appeared, sorted by frequency if you enable A→Z or Z→A sorting. This turns the tool into a lightweight word-frequency or keyword-density analyser for plain-text lists.
Real-world data is messy. The Ignore case option ensures that Apple, APPLE, and apple are treated as the same line, preventing case-only variants from slipping through as false uniques. Trim whitespace strips leading and trailing spaces before comparison, so lines that differ only in indentation or trailing spaces are correctly identified as duplicates. Both options can be combined for maximum cleaning power.