Google’s Panda algorithm launched in February 24, 2011. Recently updated Google Panda. The main cause or purpose of Google panda update was just to keep low content sites. So, Broken link and duplicate content is harmful for website or blog. Duplicate content can be dropped your good targeted traffic and ranking. Google like unique content. If Google find any duplicate content or low quality content on your website or blog site will be kicked off from their search results. So, check your content use seo tools with Duplicate Content Checker and remove duplicate content on your blog or website. This tools is free to use. 
| No | Content Checker Tools | Google Page Rank | Submit Type |
| 1. | http://www.copyscape.com | 7 | Free Submit |
| 2. | http://www.plagiarisma.net | 6 | Free Submit |
| 3. | http://www.duplichecker.com | 5 | Free Submit |
| 4. | http://www.virante.org | 4 | Free Submit |
| 5. | http://www.copygator.com | 4 | Free Submit |
| 6. | http://www.plagium.com | 6 | Free Submit |
