Duplicate Lines
Remove repeated full lines while preserving the first occurrence and your original line order.
Text Tools
Free Duplicate Cleaner
Remove repeated lines and accidental back-to-back words without touching normal repeated words elsewhere in your text. Everything runs directly in your browser, so your text stays on your device.
Your Text
Paste text to clean.
Private by design: this tool cleans text in your browser. Your text is not submitted to SDS.
Quick Text Cleanup
Catch simple duplicates before they get published.
Useful for copied lists, notes, exports, drafts, product descriptions, and other text where duplicate content can slip through unnoticed.
Adjacent Words
Fix accidental immediate repeats such as “is is,” “the the,” and “ran ran.”
Clear Results
See exactly how many duplicate lines and repeated words were fixed during each cleanup.