I'm creating a form that allow the users to write an abstract about the articles they make. and I want a web service that take the text they enter and summarize it to fit a specific number of words.
closed as off topic by Eight Days of Malaise, Al Everett, phwd♦ Jul 18 '12 at 20:02
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Check this article, which lists these options:
I have used Topicmarks, but their website seems to be down for the moment.