Duplicate Word Finder
Highlight consecutive repeated words in your text — the kind that slip past proofreading.
What This Tool Does
Paste any block of text and the tool scans it for consecutive duplicate words — pairs like the the, very very, or is is that appear back-to-back. These slip through standard spell checkers because each word is spelled correctly on its own. The tool highlights every repeated word in the original text so you can see exactly where the problem is and fix it in your source document.
Why Consecutive Duplicates Are Hard to Catch
- They often appear at a line break or sentence boundary, where the eye skips naturally.
- Spell checkers only flag misspelled words — duplicates are correctly spelled, so they pass silently.
- Grammar checkers sometimes catch the the but routinely miss repeated adjectives or verbs.
- They are common in long documents edited by multiple people or assembled from pasted snippets.
How to Use
- Paste your text into the input box.
- Click Find Duplicates.
- Review the highlighted text — red words are consecutive duplicates.
- Check the summary list below for which words were repeated and how many times.
- Fix the originals in your document.
Frequently Asked Questions
Does it find non-consecutive duplicates (same word used twice in a paragraph)?
No. The tool focuses on consecutive duplicates — words that appear immediately after each other (possibly separated by punctuation or whitespace). Non-consecutive repetition is a style concern, not an error, and is better handled by a readability or style tool.
Is the comparison case-sensitive?
No. “The The” and “the the” are both flagged as duplicates. The comparison is case-insensitive so that duplicates at the start of a sentence are not missed.
Will it modify my text?
No. The tool only highlights and reports — it does not change anything. You make the fixes in your own document.
Is my text sent anywhere?
No. Everything runs in JavaScript in your browser. Nothing is uploaded or stored.