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  1. Plagiarism checker by SmallSeoTools, 100% free tool to check plagiarism with quick and accurate results. Best online plagiarism detector for you.

  2. Plagiarism Checker. To use this plagiarism checker, please copy and paste your content in the box below, and then click on the big blue button that says “Check Plagiarism!” then sit back and watch as your article is scanned for duplicated content. Limit: 1000 Words per Search. Total Words: 0.

    • Research Methodology
    • General Conclusions: Free vs. Paid Checkers
    • Scribbr Review
    • Quetext Review
    • Duplichecker Review
    • Small SEO Tools Review
    • Pre Post SEO Review
    • Grammarly Review
    • Plagiarism Detector Review
    • Check-Plagiarism.Com Review

    The plagiarism tools in this research are tested using 4 test documents, ranging from unedited to heavily edited. Each test document consisted of plagiarized sections from 140 sourceslike Wikipedia articles, news articles, open-access journal articles, websites, theses and dissertations, and PDFs. This setup allowed us to analyze: 1. The reliabilit...

    We found that free tools were frequently misleading in their advertising and were lacking in many ways compared to paid ones. Our research led to these conclusions:

    Pros

    1. Offers a limited free version 2. Finds far more plagiarism than other tools 3. Detects plagiarism even in edited texts 4. Won’t store or sell your documents 5. Money-back happiness guarantee, with live support available 6. Self-Plagiarism Checker feature allows you to check for self-plagiarism

    Cons

    1. You need to go premium to find out your precise similarity score and view the entire report

    Free?

    Scribbr offers a limited free version that’s perfect for checking if your paper contains potential plagiarism. To view the full report, you need to buy the premium version, which costs between $19.95 and $39.95 depending on the word count. There’s no word limit, so you can upload as big a document as you want.

    Pros

    1. Built-in citation assistant helps to add missing citations 2. Documents not stored in database 3. Support options available (but no live support)

    Cons

    1. Finds partial matches 2. Not clear how the free trial works 3. Monthly subscription of at least $8.25 after free trial 4. Not effective for scholarly sources 5. Doesn’t detect all plagiarism

    Free?

    Quetext offers a free trial of 500 words, after which users must pay for a premium plan. Additionally, uploading files to Quetext is a Pro feature. If you don’t pay, you’ll have to copy-paste the text from your document instead. The paid version costs at least $8.25 per month (more expensive plans are available), which allows you to check up to 100,000 words.

    Pros

    1. Free (1,000 words per scan) 2. Doesn’t save uploaded documents 3. Relatively user-friendly reports

    Cons

    1. Distracting ads for other services 2. Low level of plagiarism detected 3. Performs very poorly with edited text 4. No color coding for different sources

    Free?

    DupliChecker’s service is free, though you can only upload 1,000 words at a time. If you go for one of their premium plans, you can go up to 25,000. If you do want to upgrade, a large number of different premium plans are offered on the site, which can be somewhat confusing to navigate. The cheapest is $10 a month.

    Pros

    1. Free (1,000 words per scan) 2. Various options for document uploads 3. Documents not stored in database

    Cons

    1. Low level of plagiarism detected 2. Page is slow, somewhat confusing, and full of ads 3. Scans individual sentences rather than full texts

    Free?

    Small SEO Tools is free to use, although you can only check 1,000 words at a time without paying. You can run multiple checks if you need to scan more than that, although the site requires you to complete CAPTCHAs to upload multiple documents.

    Pros

    1. 1,000-word upload limit 2. Color-coded highlighting 3. Some full matches 4. Citation assistant 5. Live support option

    Cons

    1. Detects a low proportion of plagiarism 2. Report is hard to read 3. Messy, ad-heavy page design 4. Color coding doesn’t distinguish between different sources

    Free?

    It’s unclear whether Pre Post SEO is actually a free tool. While the website claims there’s a search query limit for visitors, the limit is not clearly specified and did not seem to apply when we tested our documents. You can only scan up to 1,000 words per search and cannot see a complete list of matched sources (instead, you must check them manually). These limits are removed if you sign up for their premium plan, which costs $10 to $45 a month.

    Pros

    1. Language and citation assistant available 2. Does not sell or share documents with third parties

    Cons

    1. Not free! 2. Finds a relatively low percentage of plagiarism 3. Same colors used for different sources

    Free?

    Despite the way it’s advertised, Grammarly’s checker is not free. All you can do is see a screen that tells you there’s plagiarism in your text without giving you any details of where it is, how much of it there is, or what the sources are. After this you’ll be directed to download the Grammarly app and subscribe to their premium service ($30 per month). There’s a limit of 100,000 characters (about 20,000 words) even after paying.

    Pros

    1. Free to use (1,000-word limit) 2. Does not store or sell your document

    Cons

    1. Technical issues with long documents 2. Difficult to match text with sources in the report 3. Different sources highlighted in the same color

    Free?

    Plagiarism Detector is free to use and users do not need to register. However, there is a limit of 1,000 words per document. By paying, you can raise this limit to 25,000 words per document.

    Pros

    1. 1,000-word upload limit 2. Offers a citation generator

    Cons

    1. Difficult to match text with sources in the downloadable report 2. Different sources highlighted in the same color 3. Scans sentence by sentence—rarely gets a full match

    Free?

    It’s unclear whether Check-plagiarism.com is actually free. The site describes the free upload limit in a confusing way, allowing you a certain number of “queries” (sentences) per month. However, these limits are not clearly specified and did not seem to apply when we tested our documents.

  3. Online paraphrase tool allows you to rephrase text or content instantly by following the simple steps below: Step 1: Enter the text into the input section or upload a file from your system. Step 2: Click the “Paraphrase” Button. Step 3: Choose the most appropriate synonyms.

  4. Plagiarism Checker offered by DupliChecker. Completely free and accurate online tool to check plagiarism. Just Copy & Paste to detect Copied content

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  6. The best way to prevent plagiarism is by using a free online tool called PlagiumChecker. This tool will check all of your text for plagiarized content and let you know if it contains any passages that have been taken from other websites without permission or credit given where needed!

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