New Looks for Snapchat, Twitter in Bid for More Users

New Looks for Snapchat, Twitter in Bid for More Users
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SAN FRANCISCO—Struggling social-media darlings Twitter and Snapchat are taking on new looks as the services seek wider audiences from under the shadow of Facebook.

Twitter has rolled out a 280-character limit for nearly all its users, abandoning its iconic 140-character limit for tweets. And Snapchat, long popular with young people, will undergo a revamp in hopes of becoming easier to use for everyone else.