Duplicate Word Finder

Find accidentally repeated words like 'the the' in your text — free proofreading tool.

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About

About the Duplicate Word Finder

Scans your text for words accidentally typed twice in a row, like "the the" or "is is".

Editors and proofreaders use it as a final pass before publishing, while writers catch typos that crept in during heavy editing. It's one of many free text tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.

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Guide

Using the Duplicate Word Finder

  1. 1

    Step 1

    Paste your text into the Text box.

  2. 2

    Step 2

    Turn on "Case sensitive" if you want "The the" treated differently from "the the".

  3. 3

    Step 3

    Click Check to scan for repeated consecutive words.

  4. 4

    Step 4

    Review the flagged repeats, then Clear to check another piece of text.

  • Flags consecutive repeated words, like "the the" or "is is", that spell-checkers typically miss
  • Optional case-sensitive checking, so "The the" can be treated differently from "the the"
  • Works on text of any length, from a single sentence to a full document
  • Highlights exactly where the repeats occur so they're easy to find and fix
  • Works entirely in your browser — no installs and no sign-up
  • Free to use, with no limit on how many times you run it
  • Fully responsive, so it works just as well on a phone as on a desktop

Editors and proofreaders

Editors and proofreaders use the Duplicate Word Finder as a final pass before publishing, catching repeats a spell-checker won't flag.

Writers

Writers use the Duplicate Word Finder for catching typos that crept in during heavy editing or cutting and pasting between drafts.

Students

Students use the Duplicate Word Finder for cleaning up an essay before submitting it.

Translators

Translators use the Duplicate Word Finder for catching accidental repeated words introduced while reworking a sentence.

Examples

Duplicate Word Finder examples

3 worked examples

01

Repeated word slip

Checking "I will will call you tomorrow." with Case sensitive off finds 1 repeat: "will will".

02

Case-sensitive toggle

Checking "The the cat sat down." with Case sensitive on finds 0 repeats, since "The" and "the" no longer count as the same word.

03

Multiple repeats in one sentence

Checking "This is is a test test of the the tool." finds 3 repeats: "is is", "test test" and "the the".

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FAQ

Frequently asked questions

Quick answers to common questions about the Duplicate Word Finder.

What does the Duplicate Word Finder do?

It scans your text and flags words that appear twice in a row, a common typo like "the the" that spell-checkers often miss.

Is the Duplicate Word Finder free to use?

Yes. It's free, with no sign-up, no watermark and no limit on how many times you use it.

Is my text safe when I use this tool?

Yes. Your text is processed entirely on your own device — nothing is sent to a server.

Why do spell-checkers miss this kind of typo?

Each word is spelled correctly on its own, so a spell-checker sees two valid words and doesn't flag anything unusual — only checking for repetition catches it.

What does "Case sensitive" do?

When turned on, it treats "The the" as a case-sensitive comparison rather than automatically matching them as the same repeated word.

Does it only catch words repeated exactly next to each other?

Yes, it specifically looks for the same word appearing twice in immediate succession, not repeats spread further apart in the text.

Can I check a whole document, not just a sentence?

Yes. Paste text of any length, from a single sentence to a full document.

Does the Duplicate Word Finder have any limitations?

It's built for everyday prose; extremely long documents are still handled but may take a moment longer to scan.

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