Textoolz

Remove Duplicate Words

Remove duplicate words from your text while preserving order. Free online tool to eliminate repeated words and clean up content.

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The duplicate word remover scans your text and removes any words that have already appeared, keeping only the first occurrence of each unique word. Whitespace between words is preserved to maintain readability.

This tool is useful for cleaning up keyword lists, simplifying redundant text, and preparing content where each word should appear only once. You can enable case-insensitive matching to treat words like "The" and "the" as duplicates.

All processing runs in your browser — no text is uploaded to any server.

How to Use Remove Duplicate Words

  1. 1Paste or type your text into the input area.
  2. 2Optionally enable case-insensitive matching.
  3. 3Duplicate words are removed while preserving the first occurrence.
  4. 4Click the Copy button to copy the cleaned text.

Frequently Asked Questions

How are duplicate words detected?▾
The tool splits text by whitespace and tracks each word it encounters. If a word has already been seen, it is removed. Only the first occurrence of each word is kept in the output.
Does this preserve punctuation?▾
Yes. Words are compared as-is, including any attached punctuation. So 'hello' and 'hello,' would be treated as different words since the comma is part of the token.
How does case-insensitive matching work for duplicate words?▾
When enabled, words that differ only in capitalization are treated as the same word. 'Hello' and 'hello' would be considered duplicates, and only the first one is kept.
Does removing duplicate words work across multiple lines?▾
Yes. The tool processes all words across the entire text, not just within individual lines. A word that first appears on line 1 will be removed if it appears again on line 5.