Duplicate line remover
Delete repeated lines in one click. Your text never leaves your device.
- Your text is never uploaded
- Processed on your device
- Works offline
- Free, no sign-up
Empty
Result updates as you type
The result appears here as soon as you type or open a file.
Settings
Blank lines are removed instead of being compared.
Off sorts the unique lines A to Z.
How it works
Paste your list
Type, paste or open a text file with one item per line. Nothing leaves your browser.
Choose options
Toggle case sensitivity, empty-line handling and whether to keep the original order.
Copy unique lines
Duplicates are removed live. Copy the result or download it as a TXT file.
How duplicate lines are found
Each line is compared exactly as written, including leading and trailing spaces. With case-insensitive matching, Apple and APPLE count as the same line and only the first occurrence is kept. Turn on Case sensitive when Apple and APPLE must be treated as different entries.
Ignore empty lines removes blank lines entirely, which is ideal for pasted lists with stray gaps. Turn it off when blank lines matter, in which case repeated blanks collapse to a single blank line like any other duplicate.
Ordering and large lists
Keep first occurrence order preserves your original sequence and drops later copies, perfect for logs, keywords and mailing lists. Turn it off to sort the unique lines A to Z with a locale-aware comparison, which groups related entries together.
Line breaks of every kind are handled, and Unicode text is compared safely character by character. Lists of hundreds of thousands of lines process instantly on most devices, and the summary tells you exactly how many duplicates were removed.
Private by design
Deduplication runs entirely in your browser with no server or account. Customer lists, emails and private notes never leave your device and vanish when you close the tab.
There is no upload, no history and no watermark: open the tool, clean your list, copy or download the unique lines and you are done. Only the app itself may be cached for offline use, never your text.
Questions
Is my text uploaded?
No. Lines are compared inside your browser. Your text never leaves your device.
Does it keep the first or the last copy?
The first occurrence is kept and later copies are removed, so your original order is preserved. Turn off Keep first occurrence order to sort unique lines A to Z instead.
Are Apple and APPLE duplicates?
Yes by default, matching ignores upper and lower case. Turn on Case sensitive to treat them as different lines.
Is it free?
Yes. Free to use with no sign-up, no watermark and no daily limits.
Related tools
More free tools that run on your device. No uploads