Remove Duplicate Lines
Strip repeated lines from any block of text with optional trim and case controls.
What is the Remove Duplicate Lines?
This tool removes lines that appear more than once, leaving a clean list of unique entries. It is a quick fix for messy data — email lists with repeats, keyword lists, log lines, or anything you have merged from a few sources. You can optionally trim leading and trailing spaces before comparing, and match without worrying about capitalisation, so "Apple" and "apple" count as the same line. It all runs in your browser, so even large lists stay private.
How to use the Remove Duplicate Lines
- Paste your list, one item per line.
- Choose whether to trim spaces and ignore case.
- Run it to get only the unique lines.
- Copy the cleaned result.
Why use Quably's Remove Duplicate Lines?
- Keeps only unique lines
- Optional trim and case-insensitive matching
- Handles long lists quickly
- Nothing leaves your browser
- Free, no account
Frequently asked questions
Does it keep the original order?
Yes — the first time a line appears it is kept, and later repeats are removed.
Can it ignore capitalisation?
Yes. Turn on case-insensitive matching and "Apple" and "apple" are treated as duplicates.
What does the trim option do?
It removes spaces at the start and end of each line before comparing, so lines that only differ by whitespace still match.
Is it free?
Yes, and there is no sign-up.