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Plagiarism Scanner

Free

Scan text for copied content and matching web sources instantly

Your Text 0 words

Free, no signup required · Ctrl+Enter to submit

Plagiarism results appear here

Paste at least 30 words and click Check Plagiarism to scan for copied content

How It Works

  1. 1

    Paste Your Text

    Copy and paste the text you want to check -- essays, reports, blog posts, or any written content. Minimum 30 words required; 50+ words recommended for the most accurate results.

  2. 2

    Scan for Matches

    The tool extracts key phrases from your text and searches the web for matches. It also analyzes sentence structure, cliche density, and vocabulary patterns to estimate originality.

  3. 3

    Review Results

    Get an overall originality score, matched source URLs with similarity percentages, and per-sentence analysis highlighting flagged passages. Use the Humanize feature to rewrite flagged text automatically.

A plagiarism scanner needs to be fast, thorough, and clear in its results. Writers, editors, and educators don't have time to wait for batch processing or interpret ambiguous percentage scores. They need to paste text, scan, and immediately understand which parts are original and which need attention. Speed and clarity are what separate a useful scanner from a frustrating one.

Coda One's Plagiarism Scanner delivers results in seconds. Paste your text, click scan, and get three layers of analysis: an overall originality score showing the big picture, matched source URLs showing where content overlaps with existing web sources, and a per-sentence breakdown showing exactly which sentences triggered the match. The color-coded sentence view -- green for original, red for flagged -- lets you identify problem areas at a glance.

The scanner works for any type of text content: academic papers, blog posts, marketing copy, product descriptions, social media content, and professional documents. Whether you're a student checking an assignment, an editor screening submissions, a content manager verifying freelance deliverables, or a marketer ensuring ad copy is original, the scanning process is the same: paste, scan, review. The tool handles texts up to 300 words on the free tier, with higher limits available on paid plans.

Frequently Asked Questions

How long does a plagiarism scan take?
Most scans complete in 5-15 seconds, depending on text length. Shorter texts (under 100 words) typically return in under 5 seconds. The tool shows a real-time progress indicator and elapsed timer so you can track the scan status.
What does the scanner check against?
The scanner searches public web sources including websites, blogs, news articles, Wikipedia, academic repositories with public access, and other indexed online content. It extracts key phrases from your text and searches for exact and near matches across these sources.
Can I scan a full document at once?
Free users can scan up to 300 words per check. For longer documents, you can scan sections individually or upgrade for higher word limits. Scanning in sections can actually provide more detailed results, as the per-sentence analysis is more granular with focused text segments.
How do I read the scan results?
The results include three components: an overall originality score (higher is better), matched source URLs with similarity percentages (if any web matches were found), and a per-sentence analysis where green sentences are original and red sentences are flagged. Focus on the red-flagged sentences to identify specific passages that need rewriting or citation.
Can I scan content in languages other than English?
The scanner is optimized for English text and provides the most accurate results for English content. It may work with other languages to some extent, but web source matching and structural analysis are calibrated for English. For non-English content, results should be considered less reliable.

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