Shape &shape=

Crops the image to a specific shape. Currently only supporting &shape=circle.

http://api.revplit.com/resize/?url=revplit.com/lichtenstein.jpg&w=300&h=300&t=square&shape=circle

<img src="//api.revplit.com/resize/?url=revplit.com/lichtenstein.jpg&w=300&h=300&t=square&shape=circle">

Trim &trim=

Trim away blank image space on edges. Use values between 0 and 255 to define a tolerance level to trim away similar color values. You also can specify just &trim, which defaults to a tolerance level of 10.

http://api.revplit.com/resize/?url=ssl:upload.wikimedia.org/wikipedia/commons/4/47/PNG_transparency_demonstration_1.png&w=300&trim

<img src="//api.revplit.com/resize/?url=ssl:upload.wikimedia.org/wikipedia/commons/4/47/PNG_transparency_demonstration_1.png&w=300&trim">