Remove Duplicate Lines from Text & Files Online

How to use the online duplicate line remover

This remove duplicate lines online tool is built to be fast and simple. No signup, no login – just clean your text list and move on with your work.

• 1 Paste your text: add any list of lines you want to clean: email lists, product names, tags, URLs, log rows, keywords or anything else.
• 2 Or upload a file: use TXT, CSV, LOG, JSON or other text-based formats. Each row is treated as a separate line. This is ideal if you exported data from Excel or a database and need to delete duplicate rows.
• 3 Click “Remove Duplicate Lines”: the tool removes all repeated lines but keeps the first occurrence and original order. You can optionally sort the result alphabetically and then copy or download the unique list.

FAQ – Remove duplicate lines from text and files

Does this tool keep the original order of lines?

Yes. The duplicate line remover keeps the first time a line appears and removes later duplicates. The original order of unique lines is preserved unless you enable sorting.

Is the duplicate removal case sensitive?

Yes. “Line 1” and “line 1” are treated as different lines. If you ever need a case-insensitive mode for removing duplicates, we may add it later.

Can I use it with CSV and other files?

Yes. You can upload TXT, CSV, LOG, JSON, TSV and other text-based files (up to 20 MB). Each line in your file is treated as a separate item, and duplicate rows are removed.

Is there a limit on how many times I can use it?

You can use this free duplicate line remover without creating an account. To keep the server fast for everyone, there may be daily limits per browser and file size limits.