Remove Duplicate Lines - Deduplicate Text & Lists Online
Remove duplicate lines from text and lists with options for case sensitivity, trimming whitespace, and preserving order.
This tool runs in your browser.
How to use
- 01Paste multi-line text or list items into the raw input box.
- 02Configure options: toggle case sensitivity, trim whitespace, and strip blank lines.
- 03Instantly review the deduplicated list with item count metrics and copy with one click.
FAQ
Does the deduplication preserve the original line sequence?
Yes. By default, the tool retains the first occurrence of each unique entry in its original sequential order while discarding subsequent redundant entries.
Can I configure case sensitivity for text comparison?
Yes. You can toggle case sensitivity to decide whether upper- and lowercase variations (e.g. "Email" vs "email") are considered distinct or identical.
Is there a limit on how many lines I can clean at once?
Because processing leverages high-performance browser JavaScript data structures, lists with tens of thousands of lines are cleaned within milliseconds without uploading data.