After introduce of Google Panda algorithm blogger become careful about posting. Because the major intention of Panda to detect duplicate content and give penalty to those sites. Every day we make post but we are creating duplicate content intentionally or accidentally. So we should check the content before publish. Beside of this those blog who accept Guest Post they should also aware about duplicate content even I often receive many guest post which has copied from other website or blog. Eventually you may be the victim by publishing duplicate content from Guest writer by Google Panda Penalty. So blogger should check whether content is published before or not.
However it may seems to you that this is very hard to find out duplicate content, but you can easily do it by the help of duplicate content checker online tools which is absolutely free.
This is most popular plagiarism checker tool known by beginner to professional blogger. Currently this is providing free and paid service. By this tools you can check the duplicate content which is already published.
- Site Address: http://copyscape.com/
2. Article Checker
It’s a free plagiarism detection tool that help you to find copied content. Under this service you will find very dull design on this site which doesn't attract visitors. But it has a good feature that you can select Google and Yahoo Search engine to find duplicate content.
- Site Address: http://www.articlechecker.com/
This is a new service provider under the plagiarism checker service. This is also provide free and paid version. Under free version I found result is not fully accurate but if you want to use paid version you can use 7 day free trial to judge it.
- Site Address: http://www.plagspotter.com/
4. Paper Rater
Through this service you will be able to check duplicate content. This is giving accurate information and you will find some other free service with plagiarism check. Beside of this you can check Grammar and Spelling as well as proofreading.
- Site Address: http://www.paperrater.com/
From my point of view this is the best plagiarism checker tool over the net. I often use it to find duplicate content. Because you can directly check the written article rather placing post URL and it is absolutely free. You can check up to 1500 words article, however, I found the accurate result from Duplichecker.
- Site Address: http://www.duplichecker.com/
This is also most popular and reliable plagiarism checker tool where you can use this service absolutely free and you will be able to check URL as well as written article. It support more than 190 languages. And check content from almost all popular search engine. Such as, Google, Babylon and Yahoo, but to use Google you have to register with them.
- Site Address: http://plagiarisma.net/
7. Plag Tracker
Through this plagiarism checker tool you can find out part by part copied content which is very good. And it is providing free service with accurate information. You can trust on them to find duplicate content. It has categorize their service for Students, Teachers, Publishers and Site owners.
- Site Address: http://www.plagtracker.com/
Plagium is a powerful plagiarism checker tool where you can check a big article up to 25000 characters. This service is totally free. And it search duplicate content through the web, news, social networks.
- Site Address: http://www.plagium.com/
The main feature if this tools you can add Google alert where if any person republished your content then Google will send you an email alert. This is also provide free service.
Recently it is providing beta service. But the result after plagiarism check is not 100% accurate. But expecting it will improve soon. Not only you will find duplicate content but also it will find broken links, XML sitemap, internal page rank and many more.
- Site Address: http://www.siteliner.com/
Hope this article will help you to find duplicate content easily. If you feel doubt about one service provide then go for another one and then compare the result. If you know more site beside of the above list then kindly share with us.