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Free Online Plagiarism Checkers Test

If you are a student or a blogger, then you understand why so many people dread plagiarism and duplicate content. Students can have serious problems if their professors find that they’ve copied their work from the Web. And bloggers live in constant fear of duplicate content because it can literally kill a blog or a website in Google’s eyes. While intentional plagiarism is something we all fight, there is also unintentional plagiarism when you accidentally repeat someone else’s words or even your own paragraphs from another blog post or article. Don’t know about you, but I always check my writing with free plagiarism checkers before I post it anywhere. Just to be on the safe side. But which free plagiarism checker is best? Here is my test of five different options.

Method

I’m testing the top Google search results for “free plagiarism checker”: plagiarism-detect.com, duplichecker.comsmallseotools.com, dustball.com, plagscan.com, plagtracker.com and searchenginereports.net. To check the effectiveness of each tool, I’ve copied the first paragraph of this article that has been published on HubPages a while ago. I know it contains a typo (“mont” instead of “month”), but that’s actually good for the test purposes.Here are the results I got:

Plagiarism-detect.com

This used to be a neat service, but unfortunately it no longer works.

Plagiarism Detect

Plagiarism Detect

Here are the results I got. The tool proved to be quite effective and detected a lot of sentences that were used in other articles on the Web. Mind you, 1% is not plagiarism, so these results prove the test article to be unique (it is unique).

Report

Report

Just out of interest, I copy-pasted the text and ran another check. Sure enough I got the original website in the results. But the level of plagiarism showed 75% instead of 100%, which is slightly disappointing.

Plagiarized text

Plagiarized text

[box]The Verdict: Plagiarism Detect is a pretty good free plagiarism checker. It’s easy to use and the results are quite accurate. However, it doesn’t detect 100% of duplicate content[/box]

Duplichecker

Duplichecker is a popular free online plagiarism check tool. I really liked it from the start because the website is very nicely done. But the best bit was that it did a great job detecting duplicate content. It instantly found my original article and even offered me to compare the text. When I clicked on the button to do just that, I got my original article open in a new tab and it was all highlighted with red. Nice job!

Duplichecker results

Duplichecker results

[box]The Verdict: Duplichecker did a really good job. It detected 96% of duplicated content, which is a good result.[/box]

SmallSeoTools.com

SmallSeoTools.com is a really useful website where you can access quite a few free SEO tools, including a plagiarism checker. The website’s design is a bit old-fashioned, but the tools look promising. As for the plagiarism checker, the scan takes a while because the tool checks sentences one by one.

SmallSeoTools.com

SmallSeoTools.com

[box]The Verdict: Unfortunately, the results weren’t very impressive. The tool detected only 10% of duplicate content.[/box]

Dustball

Dustball is the second search result from Google. This online plagiarism checker has two versions – free and premium. I’ve used the free version. Compared to Plagiarism Detect, Dustball is a very basic tool. You can only copy-paste the text you want to check and there aren’t any other options:

Dustball

Dustball

So I copy-pasted the text and got the results. Dustball did detect duplicate content, but the way it presents it in search results is very uncertain – “Possible plagiarism”. Moreover, it marked some of the phrases as OK, which is not true. In my opinion, this makes the tool pretty useless, as you can use Google with better effect.

dustball results

Results

[box]The Verdict: Dustball proved to be pretty useless, as it blatantly marked some plagiarized content as OK.[/box]

Plagscan

Plagscan is a tool that lets you either upload a file in MS Word, text or HTML format, or copy-paste the text:

Plagscan

Plagscan

The results were satisfying, as the tool detected duplicate content and provided the URL for the original article:

Plagscan Results

Plagscan Results

[box]The Verdict: Plagscan did a good job and successfully detected duplicate content.[/box]

Plagtracker

Plagtracker is the next tool on my list. The website looks quite nice and the tool promises to be “the most accurate plagiarism checking service”. Well, let’s see!

Plagtracker only has one options for checking text – you need to copy-paste it:

Plagtracker

Plagtracker

What I hated is that the text with instructions didn’t get removed. This looks pretty lame. But let’s see the results:

Plagtracker Results

Plagtracker Results

Only 67% instead of 100%. But at least it detected the source correctly.

[box]The Verdict: Plagtracker is OK, but the website doesn’t work well with Chrome and the results are not 100% accurate. Can be used for some basic checking, but that’s all.[/box]

Searchenginereports.com

This tool used to be pretty good, but now it’s gone downhill. There is no point writing about it because it returned a processing error every time I tried to check the text or the URL:

searchenginereports

Searchenginereports.com

Test results

According to my test results, Duplichecker is the best free plagiarism checker out of the top Google search results. It’s not perfect, but it definitely provides better results than any of the rest.