Text Tools
Duplicate Line Remover
Paste a list of lines and remove every duplicate — keeping only the first occurrence.
Got a list with repeated entries? Paste your text and this tool strips every duplicate line in one click, leaving only unique lines behind. Works great for cleaning email lists, keyword sets, log files, and any multi-line data.
Why Use This Tool?
Instant Results
Duplicates removed the moment you paste — no waiting.
Paste Any Format
Works with comma-separated lists, line-by-line text, or raw logs.
100% Private
Processing happens in your browser — your data never leaves your device.
No Install
Open the page and start cleaning — nothing to download or configure.
How to Remove Duplicate Lines
- Paste your text into the input box.
- The tool automatically detects and removes duplicate lines.
- Click Copy to grab the clean, deduplicated result.
FAQ
Does it preserve line order?▾
Yes. The first occurrence of each line is kept; later duplicates are removed, so the original order is maintained.
Is it case-sensitive?▾
By default yes — 'Apple' and 'apple' are treated as different lines. Use the case-insensitive toggle if you want them treated as the same.
How many lines can it handle?▾
Thousands of lines with no performance issues, since everything runs in your browser.
Pro Tips
- Sort lines alphabetically after deduplication for even cleaner output.
- Use alongside the Blank Line Remover to get a fully clean list.
- Paste CSV data column by column to find duplicate values.
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