The remove duplicates works like this: it removes duplicate lines with optional case-insensitive and trim-whitespace matching, preserving first-occurrence order. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the Remove Duplicates
Paste your text into the editor.
Pick the transformation or analysis you need.
Review the highlighted result before using it.
Copy the finished text back to your document.
Features
Remove duplicate lines and words from text
Instant result, no page reload
Works in any modern browser, desktop or mobile
Free with no signup
Common mistakes to avoid
Pasting text with invisible characters from other editors
Expecting automated transforms to preserve legal formatting exactly
Examples
Input
Result
List of 100 emails with repeats
Unique list of 73 emails, order preserved
Best used for
Getting a reliable answer for remove duplicates without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
Text processing happens in your browser; nothing is uploaded.
Frequently asked questions
Does it keep the original order?
Yes - first occurrence wins. Use the sort option afterwards if you need alphabetical output.
Which duplicate is kept?
The first occurrence, in original order - so a list sorted the way you like stays that way, and repeated later copies are what get dropped.
How do trim and case options affect matching?
Trim ignores leading/trailing spaces and case-insensitive treats "Apple" and "apple" as the same entry - both widen what counts as a duplicate before anything is removed.