Instantly remove duplicate lines from any list. Case-sensitive or case-insensitive matching. Keep first or last occurrence. 100% private.
Remove duplicates instantly
Sensitive or insensitive matching
Data never leaves your browser
Paste your list above to sort, clean, and transform. All processing happens in your browser — your data never leaves your device.
Everything you need to deduplicate lists quickly and accurately, with full control over matching options.
Remove all duplicate lines with a single click. No configuration needed for basic deduplication - just paste and clean.
Choose whether "Apple" and "apple" should be treated as duplicates or unique items based on your data needs.
Control which occurrence to keep when duplicates are found - preserve either the first or last instance.
Automatically trim leading and trailing spaces before comparing, so " text " matches "text".
See exactly how many duplicate lines were removed, helping you understand your data quality.
Maintain the original order of your list while removing duplicates. First occurrences stay in place.
"Apple" and "apple" are treated as different items. Best for code, file names, and technical data.
Apple ≠ apple "Apple" and "apple" are treated as duplicates. Best for email addresses and general text.
Apple = apple Removes leading/trailing spaces before comparing, so " text " matches "text".
" text " = "text" Preserves the first instance of each duplicate and removes subsequent ones.
A, B, A, C → A, B, C Remove duplicate email addresses to improve deliverability and avoid sending multiple messages to the same person.
Clean up spreadsheet exports from CRM systems, databases, or other tools that may contain duplicate entries.
Clean link lists for SEO audits, sitemap validation, or web scraping results.
Remove duplicate keywords from SEO research exports before importing into your tools.
Combine lists from different sources and automatically remove duplicates that appear in multiple lists.
Clean data before importing to databases to avoid duplicate record errors and maintain data integrity.
Microsoft Excel has a built-in "Remove Duplicates" feature, but ListWrangler offers several advantages for quick deduplication tasks. With ListWrangler, there's no need to open Excel, create a spreadsheet, or navigate through menus - just paste your list and click to deduplicate.
ListWrangler is also faster for one-time tasks. Copy a list from anywhere - an email, website, document, or database export - paste it in, remove duplicates, and copy the result. The entire process takes seconds rather than the multiple steps required in Excel. Plus, since ListWrangler runs entirely in your browser, there's no risk of your data being uploaded to any server.
For complex data manipulation across multiple columns, Excel remains the better choice. But for straightforward list deduplication, ListWrangler is faster, simpler, and more accessible from any device with a web browser.
Simply paste your list into the editor above (one item per line), then click the 'Clean' menu and select 'Remove Duplicates'. You can choose case-insensitive matching to treat 'Apple' and 'apple' as duplicates. The tool instantly removes all duplicate lines, keeping only unique entries.
Case-sensitive mode treats uppercase and lowercase as different, so 'Apple' and 'apple' are considered unique items. Case-insensitive mode treats them as duplicates and keeps only one. Choose based on your data - email addresses typically need case-insensitive, while code or file names may need case-sensitive.
Yes! Copy your column from Excel, paste it into ListWrangler, remove duplicates, then copy the cleaned list back to Excel. This is often faster than using Excel's built-in duplicate removal, especially for one-time cleaning tasks or when you want more control over the process.
Yes, by default ListWrangler preserves the original order of your items while removing duplicates. The first occurrence of each item is kept in its original position. If you want to sort your list after deduplication, use the Sort menu options.
ListWrangler can handle lists with tens of thousands of items. Since all processing happens in your browser, the only limit is your device's memory. Even very large lists are processed in milliseconds without any server uploads.
Yes, ListWrangler can trim leading and trailing whitespace from each line before comparing. This means ' Apple ' and 'Apple' would be considered duplicates. Use the 'Trim Whitespace' option in the Clean menu to enable this feature.
Copy your list and paste it into the editor (one item per line).
Select case-sensitive or case-insensitive matching.
Click Clean > Remove Duplicates to deduplicate instantly.
Copy your unique list or download it as a file.
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