Duplicate Word Remover
Remove duplicate words from text while preserving the first occurrence and original word order. Flattens text into one space-separated line — newlines are not preserved. Text never leaves your device — everything processes locally in your browser.
How to Use the Duplicate Word Remover
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Frequently Asked Questions
Does this remove duplicate lines or just words?
Words only, and line breaks are flattened: the tool splits on all whitespace and joins with single spaces, so multi-line input comes back as one line. For duplicate lines use Text Deduplicator.
Is matching case-sensitive?
No — matching is case-insensitive (keys are lowercased), so 'The' and 'the' count as the same word. The first occurrence keeps its original casing.
Does it keep the first occurrence?
Yes — the first instance stays and later repeats go, so sentence structure and emphasis stay intact.
Why preserve word order?
Removing words is safe only in place — reordering would scramble meaning, so the tool deletes without rearranging.
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Last updated October 2026