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FilterTool
     
FilterTool.com is an online application to manage your Google™ AdSense competitive ad filters, allowing you to block out MFA's and other low paying ads.

Filter Tool utilizes technology available from Google™ through their preview system and does not violate the AdSense TOS in any way.

In contrast to Google™ AdSense preview tool, FilterTool allows you to:

Screen Ads for multiple regions.
Mark ads as "good" so that you do not have to review them again and again.
Post the "bad" list directly to Adsense
Preview up to 60 ads at a time.

Don't take my word for it - sign up for a free trial.