Whitespace cleaner
Trim lines, collapse extra spaces and tidy up blank lines.
Text & writingRemove duplicate lines
Clean up a list by removing repeated lines, with optional case matching.
Ready when you are.
◎ No uploads. Your input stays here.↗ Free to use. No account needed.⌘ / Ctrl + Enter to run
A worked example
Using the default settings. You can try the same input in the workspace.
Input / settings
apple pear apple banana
Expected result
apple pear banana
A LITTLE GUIDANCE
How to use Remove duplicate lines
Paste a list with one item per line. Choose whether letter case matters; the first occurrence is preserved.
Good to know
Lines are compared exactly, including spaces. Use the whitespace cleaner first if you want trimmed comparisons.
A few quick answers.
Are differently capitalized lines duplicates?
Only when Ignore letter case is enabled. The first occurrence is retained; spacing remains significant. Clean whitespace first when spaces should not distinguish lines.
Is my input sent to a server?
No. This tool processes your input in your browser. We don't store your text, files or results. Standard website access logs are separate; read our privacy notes.
Can I use it for free?
Yes. No account, subscription or usage credits are required.
How do I keep my result?
Use Copy or Download after running the tool. Inputs are not saved automatically and disappear when you leave or refresh the page.
Something not right? Report a problem with this tool. Include the steps, but never passwords or private input.