Remove Duplicate Words

Remove repeated words while keeping their original order.

Strip repeated words from any text while preserving the original word order and spacing. Optional case-insensitive matching treats Apple and apple as the same word.

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About Remove Duplicate Words

Keyword lists, tag clouds, and hastily assembled notes have a habit of repeating themselves: 'marketing, seo, marketing, content, seo'. When the repetition is inside the text rather than one item per line, a line-based deduper can't help, you need a tool that walks through the words themselves. Paste any text and this one strips every repeated word while keeping the first occurrence, the original word order, and all your spacing and punctuation exactly as they were.

The classic use is cleaning keyword and tag lists, where duplicates dilute the list's usefulness and make it look sloppy. Writers also use it on drafts to catch accidental double-typing ('the the'), and data folks use it to normalize free-text survey answers before analysis. Optional case-insensitive matching treats 'Apple' and 'apple' as the same word, which helps with lists assembled from mixed sources.

Note what it doesn't do: it won't reorder anything, fix spelling, or merge near-duplicates like 'run' and 'running'. Those are different words as far as the tool is concerned. And because it preserves spacing and punctuation, the cleaned text drops straight back into wherever it came from without reformatting.

How to use Remove Duplicate Words

  1. Paste your text.
  2. Toggle case-insensitive matching if needed.
  3. Click the button and copy the cleaned text.

Why use this tool?

  • Preserves original word order and spacing
  • Reports how many words were removed
  • Optional case-insensitive matching

Tips for best results

  • Use case-insensitive matching on keyword lists assembled from multiple sources with mixed capitalization.
  • Run it on a draft to catch embarrassing double-typed words like 'the the' before publishing.
  • Remember it keeps the first occurrence, the surviving copy stays where it originally appeared.
  • Don't expect it to merge variants: 'run' and 'running' count as different words.
  • Clean the keyword list first, then alphabetize it with the sort-lines tool for a finished result.

Frequently asked questions

Does it remove the first or later occurrences?
The first occurrence is kept; later repeats are removed, and everything stays in its original position.
Does it affect punctuation?
No. Spacing and punctuation stay exactly as they were, so the cleaned text needs no reformatting.
When should I use this instead of remove-duplicate-lines?
Use this when repeats are words inside running text or comma-separated lists; use remove-duplicate-lines when each entry sits on its own line.
Will it merge similar words like 'run' and 'running'?
No, only exact word matches are removed. Stemming and synonym merging are beyond what a dedupe tool does.

Related tools

Remove Duplicate LinesRemove duplicate lines from any list, keeping the first occurrence. Text CleanerTrim, collapse spaces, drop blank lines and dedupe in one pass. Word Frequency CounterSee every word ranked by how often it appears. Keyword Density CheckerFind the top 1, 2 and 3-word phrases in any text, with density %.