Paraphrasing Tools Online

Paraphrasing tools can make your job easier and faster. However, you should keep in mind that not all of these online tools are reliable and effective. Some of them can be quite useful, depending on a type of text.

Paraphrasing Tool

Article Rewriter Tool 

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If you use the above tools, you should still think how to change word order, change 
parts of speech, use synonyms, use negatives or opposite expressions (antonyms), combine (into one) or separate (into two or more) sentences, use passive voice instead of active voice or vice versa. 

There is a good online dictionary of synonyms:
http://www.synonym.com