Duplicate Content Checker Tools

Four Free Duplicate Content Checker Tools

1. Copyscape

One of my favorite, reliable and accurate tool is copyscape, which provides me the ability to search published and unpublished articles against duplicate content issue. The tool will search all pdf files, internet websites, blogs, forums etc and find the locations with links from where a article is copied.
The tool is free, but in free package you can only search already published articles through its link. If you want to check a unpublished article then you need to buy credits. 1 credit is charged for checking a article having maximum 2000 words. You can buy 200 credits for just $10 ($.05 per credit).
If you deal with high volume of content then you can get premium IP to integrate the tool in your CMS and search all the articles inside your blogging platform.

2. Duplichecker

Another free tool where you can check unpublished articles for free is duplichecker. You can either paste the article or upload the .txt file to let the tool search the article and find out if it is copied or a unique one. It can use Google, Yahoo and MSN indexer to search the duplication on internet. However the recommended indexer is Google.com

3. Plagiarisma

This tool has 3 option that allows you to detect duplicate content issue. You can search the whole text, or URL of a article or you can upload a .txt, .doc, .rtf etc files. More then 190 languages are supported by the tool and the accuracy of the result is sure.

4. Plagium

This tool allows you to paste a article having maximum 25,000 characters. It is one of the best alternative of copyscape tool having advance features. Get email alerts when your article is copied, work with yahoo, bing and google indexer.
They also offer premium membership where you can buy 60,000 characters for just $1 (around 12 searches) and 1000,000 characters for just $10 (around 220 searches).