Remove Duplicate Lines

🧹 Remove Duplicate Lines

Remove duplicate lines from any list, with sorting and trimming options.

Sort A→Z Trim spaces Case insensitive

Result

About the Remove Duplicate Lines

Remove Duplicate Lines cleans up any list by deleting repeated lines. Options let you ignore case, trim whitespace and sort the result — perfect for cleaning email lists, keywords or CSV columns.

It turns a messy paste into a tidy, unique list in one click.

How to use it

Paste your list, one item per line.
Choose case and trim options.
Click to remove duplicates and copy the clean list.

Every tool on SEOKeyMaster is 100% free, works right in your browser, and requires no signup or API key. Your data never leaves your device.

Frequently Asked Questions

Does it keep the original order? ▼

Yes, unless you enable sorting, in which case the list is sorted alphabetically.

Are blank lines removed? ▼

Trimming removes surrounding spaces; you can also drop empty lines.