Free Plagiarism Comparison Tool

Duplicate Content Checker

Compare two pieces of content side by side. Instantly see the similarity score and find exact matching phrases before you publish.

Original Content

Content to Compare

Match Sensitivity:

Similarity

0%

of Text 1 matched

Text 1 Words

0

total

Text 2 Words

0

total

Matched Phrases

0

found

Matched Words

0

words

Longest Match

0

words

🔍

Duplicate Risk Level

Paste content in both boxes to check...

⚠️ Matching Phrases Found

    About This Tool

    Free Duplicate Content Checker for Writers and Publishers

    Our free Duplicate Content Checker compares two pieces of text directly in your browser and highlights exact matching phrases between them. It is built for writers, editors, and SEO teams who need to confirm that rewritten or repurposed content does not overlap too closely with a source article, a competitor page, or a previous draft.

    🎯 Key Features:

    • Similarity Score - Shows what percentage of Text 1 matches Text 2
    • Matched Phrase Detection - Lists the exact phrases that appear in both texts
    • Adjustable Sensitivity - Choose how many consecutive matching words count as duplicate content
    • Longest Match Tracking - Flags the single longest duplicated phrase
    • Privacy First - All comparison happens locally in your browser, nothing is uploaded anywhere
    • Download Option - Save a full comparison report as a text file

    📊 Understanding Your Score:

    • ✅ 0-15%: Low Risk - Content is largely original
    • ⚠️ 15-35%: Moderate Risk - Some phrases overlap, review and rewrite them
    • ❌ 35%+: High Risk - Significant duplication, rewrite before publishing

    💡 How Match Sensitivity Works:

    • Strict (4 words): Flags shorter matching phrases, good for catching subtle copying
    • Standard (6 words): Balanced setting that matches how most plagiarism tools flag content
    • Loose (9 words): Only flags longer matches, useful when comparing content on the same topic that naturally shares some terms

    ⚠️ Good to Know:

    • This tool checks two texts against each other only, it does not crawl or search the live web
    • To check content against a published page, paste that page's text into the second box
    • Common phrases, quotes, and names can trigger matches even in original writing, always review flagged phrases before rewriting
    • For SEO content, aim for low similarity against both your sources and your own previously published articles
    Scroll to Top