Plagiarism Checker

Skip to main content

  1. University of Johannesburg

  2. LibGuides

  3. Science

  4. Science – Copyright, Plagiarism & Referencing

  5. Home

Science – Copyright, Plagiarism & Referencing : Home

  • Home

  • UJ Plagiarism Policy

  • Turnitin @UJ

  • Copyright

  • Creative Commons

  • Copyright Myths & FAQ

  • Academic Integrity & Ethics

  • Academic Misconduct

  • Plagiarism

  • Plagiarism Checker

  • Copyright vs Plagiarism

  • Plagiarism Prevention for Students & Academics

  • Paraphrasing

  • Citations: In-text

  • Citations: References

  • Quizes, Tutorials & Videos

  • Science: Library Subject Guides

UJLink: Library Catalogue


Content of the LibGuide:

  • Copyright, Plagiarism & Referencing LibGuide
  • 17SCIT1B1/SCIT02: Copyright and Plagiarism
  • What is Copyright?
  • Copyright Myths & FAQ
  • Creative Commons
  • Academic Integrity & Ethics
  • Academic Misconduct
  • Turnitin @UJ
  • UJ Plagiarism Policy
  • What is Plagiarism?
  • Plagiarism Checker
  • Copyright vs Plagiarism
  • Plagiarism Prevention for Students & Academics
  • Paraphrasing
  • Citations: In-text
  • Citations: References
  • RefWorks
  • Quizes, Tutorials & Videos

Quick Links

  • University of Johannesburg
  • Faculty of Science
  • Sciences Librarian Subject Portal
  • ULink: Student Portal
  • UJ Library  
  • UJLink: Library Catalogue


  • Terminology/Glossary



What is Plagiarism?

Many people think of plagiarism as copying another’s work or borrowing someone else’s original ideas. But terms like "copying" and "borrowing" can disguise the seriousness of the offense:

According to the Merriam-Webster Online Dictionary, to "plagiarise" means

  • to steal and pass off (the ideas or words of another) as one’s own
  • to use (another’s production) without crediting the source
  • to commit literary theft
  • to present as new and original an idea or product derived from an existing source

In other words, plagiarism is an act of fraud. It involves both stealing someone else’s work and lying about it afterward. ( Source )

Sciences Subject Guides

UJ Faculty Librarian: Science

Pavlinka Kovatcheva's picture
Pavlinka Kovatcheva
Email Me

Tweets by @ujlibscience


University of Johannesburg Library
Auckland Park Campus
+27 11 5592621


Social: Facebook Page LinkedIn Page Pinterest Page Twitter Page YouTube Page
Subjects: Biochemistry , Botany , Chemistry , Environmental and Energy Science , Geography , Geology , Information Technology , Mathematical Sciences , Physics and Astrophysics , Zoology

Follow me on Facebook & Twitter

What is Plagiarism and How to Avoid it?

  • Next: UJ Plagiarism Policy >>

  • Last Updated: Aug 30, 2018 5:50 PM
  • URL:
  • Print Page
Login to LibApps

copyright , plagiarism , referencing , science , uj

Model Heading

Close Model

Submit Guest Post
Contact Us


Visitors are allowed to use limited amount of searches. please register now to increase this limit
its free to create account

Look’s Like you have now used this page from previous 30 minutes,
Please refresh this page and try again

Free Online Plagiarism Checker

Unique Content
Plagiarized content

Checking your content…



  • Plagiarism Results
  • Matched Sources
  • Document View
  • Grammar Results New
  • Readability New
Sources Similarity
No sources found against your content..

Document View

Generate Plagiarism Report

Get Premium
  • More Accurate

  • 10X Faster

  • No Ads

  • Priority Support

Upgrade Now

Tool Features

  • Generate Reports

  • Generate reposts at and share it with your colleagues.

  • Upload Files

  • Check Plagiarism by directly uploading .DOC / .TXT / DOCX / .PDF files.

  • 100% Safe & Secure

  • Any article you check at is 100% Safe & Secure. we do not save your content.

  • Keywords Density

  • Check keywords density in your content, by one word, two words and three words.

  • Grammar Checker

  • Check spell mistakes and also errors in your writting styles and in your grammar.

  • Compare Text

  • Compare full text with any matched sources. You can also compare each sentence separately.



Add this Tool to Your website

Add Prepostseo free plagiarism checker tool to your website and allow your users to scan papers, Articles and documents directly from your website. To use, simply copy the code given below and paste it to your webpage where you want to display it.

Live Preview

How to check for plagiarism

No rocket science involved to check papers for plagiarism free, all you have to do is paste your content that you want to check for plagiarism and click on the submit button. Now let our online scan tool handle rest of the things.

Understand the results:

When you will paste your content into the input box, our tool will parse your full article into small sentences of 7-10 words. After sentences parsed it will start checking plagiarism for every sentence and will display results real time in front of you. We try to provide you best anti-plagiarism report for your content.

How to avoid Plagiarism?

If you are a student, writer or an author of a magazine you will definitely like to submit 100% Unique Articles. Some plagiarism tools check your content once and display you the overall result for your assignment or whatever you submitted to check plagiarism. But PrepostSEO online plagiarism checker free to use and it check your essay sentence wise and go through each and every word.

If you want to avoid plagiarism for content, then there are a lof of ways by which you can make your content 100% unique and usable. Secondly do not try to re-write content by using online re-writers because those tools might help you to give you a Original content but they ruined content grammar, spell and writing style.

Prevent Content Stealing

Plagiarism Checker Widget

Website widget is now available; you can add this tool in your website.

Get Code

WordPress Plugin

WordPress plugin allows you to check the originality of your post, directly from the WP panel.

Get Plugin


How plagiarism is being Checked

The text you enter is scanned sentence by sentence on the search engines. There will be two type of results.

  1. If the sentence that is checked already exists on the internet, a red alert will appear and content will be labeled as plagiarized.
  2. And if your content is unique, a green alert will appear against that sentence. After a full scan, an overall result will show that how much unique is that article.
  3. Keywords Density: Calculate the keywords density of your content and give results for One word, Two words, and Three words keyword density. Check Prepostseo separate keyword density checker tool.

Online Plagiarism Checker

PrePost Online Plagiarism Checker is widely used to check the originality of content. You can Detect Plagiarism by just copy pasting the content or by uploading files. Using Plagiarism Detector is essential for protecting your content as duplicate Content is not acceptable by the Google. Plagiarized content can harm your website and down your ranking in search engines.

100% Free Tool:

We were planning to make this Tool totally free and now we made it! You can check plagiarism free with unlimited searches.

The only limit is on total number of words per search. For free users, this limit is 1,000 words and it could be increased to 5,000 words with any premium plan. If you are not sure how much words your documents have, you can use prepostseo word count tool to calculate total number of words and characters.

We respect our users, Any article you check at is 100% Safe & Secure. we do not share any of your content publicly. Also, we do not save your content in our database.

What is Plagiarism?

It is defined as “The process of copying the data from the internet or getting someone’s idea and then sharing it as your own data is called plagiarism.”

This is highly undesirable practice and is considered as fraud as it involves immoral activities of stealing the data or idea and then lying about it. Because of this cheating activity, many software has been launched which are used to detect for plagiarism. The main purpose of using this software is to scans the instances of the copied data. The online duplicate content checker not only checks the stolen instances of data but it also tells the sources of that stolen data.

Prepost SEO copy pasted content checker is specially designed for students, writers, teacher and webmasters to check papers, assignments, essays, thesis, and articles. It is best online text checker for students and webmasters and for educational institutes. With our anti-plagiarism software, you can generate online reports and share it (All reports are 100% secure, only you can view those reports). Universities and colleges named our Tool as “Best free plagiarism checker online”.

PrepostSEO developed this online detector for writers to find originality their article to avoid their content to be plagiarized. To make this online copy checker fast, we tried every method to improve the user experience. This Online Software not only scans plagiarized content percentage but it also shows you the grammar and spells mistakes in your essay, article or assignment.
If you want to compare two documents for plagiarism you can use plagiarism comparison tool .

What are other parameters shown?

When you start using plagiarism checker online then you also have to check other things about the content that you are going to submit. So why also display content status, keywords density and other useful information that can help you to improve your content.

Types of Plagiarism Scanners

This software usually contains a box where you can copy paste the lines or paragraphs which you want to check for plagiarism. All the plagiarized lines and paragraphs will be underlined in red color and the percentage of underlined data will also be shown. It is used by students to check the papers or assignments and make it original by deleting all the plagiarized phrases. Similarly, teachers also use diff checker to compare text of the papers and assignments. SEO specialists are using this tool to check their hired freelancers as they need 100% unique content from them. Publishing the duplicated data is a big crime and in order to minimize this risk, almost each and every website uses this tool before publishing the content.

When the process of searching your content from search engines finished you can also generate reports to share it with your teacher, author or with your writer.

Share on facebook

Share on Tweet

Share on Goolge+

Want this plagiarism checker tool for your School, College or University website?


  • Very fast and accurate

  • 100% Safe & Secure

  • Files support (.txt, .doc, .docx and .pdf)

  • Plagiarism APIs support

  • WordPress Plugin [ download plugin ]

  • Genrate reports for your content

  • Check keywords density

  • Compare text for plagiarism feature

  • Thousands of satisfied users

  • Want any improvment? contact us

Android App

Download prepostseo Andriod App and check your papers directly from your mobile.

Chrome Extension

Get our new chrome extension and access all popular seo tools with just one click.

Popular Tools
  • Plagiarism Checker
  • Article Rewriter
  • Website Seo Checker
  • Word Count & Character Count
  • Google PageRank Checker
  • Domain and Page authority Checker
  • Plagiarism Comparison Search
  • Page Authority Checker
  • Domain Authority Checker
  • XML sitemap Generator
  • Keyword Density Checker
  • Diff Checker
  • Bulk Domain Whois Checker
  • Reverse Whois Checker
  • Code to Text Ratio
  • Bulk Domain Age Checker
  • Google Index Tool
  • Broken Links Checker
  • Reverse Image Search
  • Auto Backlinks Maker
  • DNS Records Checker
  • Server Port Scanner
  • Check DNS Propagation
  • Website Ping Tool
  • Bulk Alexa Rank Checker

What Is Coming Next

Also we are developing a separate Tool that will help universities and collages to embed this online software to their student’s portals or on their educational websites.

If you have any suggestions regarding our plagiarism checking tool, you are welcome to contact us .

Feedback from our users

Prepostseo has 90,000+ happy clients including Webmasters, College Students, University Teachers and Content Writers around the globe. Positive feedbacks from previous customers are enough proof that we have the most accurate Tools.

Well a lot of online free plagiarism checkers are available but no one was proving the reports. Those who provide were very poor or un-trustable. As a writer I have to show my clients that content is 100% unique. Prepostseo is the perfect plagiarism report generator I found over the internet. Most of all my content is 100% secure.

~ Hira ~

Writer, freelancer

PPS plagarism checker is best and easiest plagiarism scanner available. I have to check my papers on regular basis because plagiarized assignments are not acceptable. Thanks for your great effort to make this tool free for normal users.

it’s the best online Tool i have ever used. Very fast and accurate.

~ Asad Ahsan ~

CEO, xclicx

I was always worried about posting articles to my blog because I was unable to find a premium quality plagiarism analyzer. But I am thankful to the whole team of prepostseo who made this awesome tool.

i think this is the only single tool available on internet that check content deeply.

~ Muddsar Sardar ~

Manager, KRT Solutions

User Rating

4.8 / 5
(16 Reviews)

5 Stars – by ,
September 01, 2018

Its best and awesome tools

5 Stars – by ,
August 13, 2018

Best plagiat check found today. this is one of the best alternative to turnitin plagiarism detection software. i recommend this tool for teachers, essay writers and webmasters

5 Stars – by ,
July 26, 2018

The Best tool Ever

5 Stars – by ,
April 12, 2018

i used your paid version, that’s working perfect.. my friend told me about your website. It’s worth bookmark

Page 1 of 4:
« Prev.
Next »

+ Post Your Review

Submit Review


Submit Review

What’s SEO Content is all about: Its Types and How to Create an Effective Content Strategy

What’s SEO Content is all about: Its Types and How to Create an Effective Content Strategy

If you are new to the field of product search marketing or search engine marketing then, you must have to understand the term “SEO Content”. Now the whole search engine marketing revolves around effective content creation, and it’s posting on different platfor….

Read More

Why Check Your Post Plagiarism Before You Publish It

Why Check Your Post Plagiarism Before You Publish It

Plagiarism means a practice where we steal or take someone else work or idea and presents it as of our own. It is actually against the law as someone’s rights are exploited through it. So to avoid this practice we need to check the piracy of our posts before publishing it….

Read More

Grammar Checker

PrePost Grammar checker helps students, writers and teachers to write better English. It improves your text by correcting complex expressions & spelling mistakes.

View Tool

Plagiarism Comparison

Plagiarism Comparison Search tool compare two documents to find out the duplicate content percentage between them. you can compare two files or two webpages.

View Tool

Article Re-writer

Free online article re-writer to spin your text. Re-write your articles, documents, assignments to prevent plagiarism.

View Tool

Similar Page Checker

Similar Page Checker, Checks similarity in design , meta tags and text between two different urls. Just copy paste both web urls and let the tool handle rest of the algorithms.

View Tool

Did you mean…

option 1
option 1
option 1
option 1

Explain it…

Ignore Suggestion

Ignore All

User Your Own Word:



From SEO Experts to Hosting Companies, Our Tools are discussed by top digital marketing experts. Our remarkable record forced users to discuss our tools to their websites.