Text Deduplicator
Remove duplicate lines while keeping the first occurrence, with optional case-insensitive and trim matching, in your browser.
Runs entirely in your browser — nothing you enter is uploaded or stored.
Text Deduplicator
Remove duplicate lines while keeping the first occurrence, with optional case-insensitive and trim matching, in your browser.
Paste your input on the left and the result is produced instantly — entirely in your browser. Your data never leaves the page, which you can confirm from the Network panel or our privacy policy.
Frequently asked questions
How do I use the Text Deduplicator?
Paste or type your input on the left, set the options, and the output appears on the right — copy or download it. Everything runs in your browser.
Is my data uploaded anywhere?
No. This tool runs entirely in your browser — your input is never sent to a server. You can verify it in the Network tab or in our Content-Security-Policy.
Is the Text Deduplicator free?
Yes — completely free, no sign-up and no limits. Everything happens client-side.