Remove duplicate lines
Clean up a list by removing repeated lines, with optional case matching.
Text & writingWhitespace cleaner
Trim lines, collapse extra spaces and tidy up blank lines.
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
A little more space. A little less clutter.
Expected result
A little more space. A little less clutter.
A LITTLE GUIDANCE
How to use Whitespace cleaner
Paste your text and choose whether to trim line edges, collapse spaces, remove blank lines or join everything onto one line.
Good to know
Whitespace can be meaningful in code or formatted data. Review the output before replacing your source.
A few quick answers.
Can I remove empty lines without joining paragraphs?
Choose Remove blank lines to keep non-empty lines separate. Everything on one line replaces all whitespace runs with one space.
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.