BosConvertPro LogoBosConvertPro
List Editor
Processing Options

Instant Processing

Remove duplicates from thousands of lines in milliseconds. Real-time results as you type.

100% Private

All processing happens in your browser. Your data never leaves your computer or touches a server.

Flexible Options

Case sensitivity, whitespace trimming, empty line removal, and alphabetical sorting — all configurable.

How to Remove Duplicate Lines

1

Paste or Upload

Paste your list directly into the input area or click Upload File to load a .txt, .csv, or .md file from your device.

2

Configure Options

Choose case sensitivity, whitespace trimming, empty line removal, and sorting in the options panel on the right.

3

Copy or Download

Your unique lines appear instantly on the right. Click Copy Result or Download to save the cleaned list.

Common Use Cases

Email & Mailing Lists

Clean marketing lists by removing duplicate email addresses before launching email campaigns.

Server Log Files

Strip repeated log entries to focus on unique events and speed up debugging sessions.

SEO Keyword Research

Merge keyword lists from multiple tools and remove overlapping terms before analysis.

Database & CSV Data

Prepare datasets by removing identical rows before importing into spreadsheets or databases.

FAQ

FAQ

Is my data sent to a server?
No. All processing happens entirely in your browser using JavaScript. Your text is never uploaded or stored anywhere — it stays on your device.
How many lines can the tool handle?
The tool comfortably handles tens of thousands of lines. Processing is nearly instant for lists up to 100,000 lines, depending on your device's performance.
What does case-sensitive mode do?
With case sensitivity on, 'Apple' and 'apple' are treated as different lines and both are kept. With it off (default), they are treated as duplicates and only the first occurrence is kept.
Can I upload a file instead of pasting?
Yes. Click Upload File to load any .txt, .csv, or .md file. The content loads instantly into the input editor, ready to be processed.
Does the tool preserve the original order?
Yes. By default the first occurrence of each line is kept in its original position. Enable Sort Results in the options panel to reorder the output alphabetically.
What file format is downloaded?
Results are downloaded as a plain .txt file named cleaned-list-[timestamp].txt, which can be opened in any text editor or imported into other tools.