Resizing options

http://media.example.com/media/image-200x300.jpg

will create a JPEG thumbnail preserving aspect ratio, with a maximum width of 200 pixels and a maximum height of 300 pixels.
IF the original image is a GIF or WEBP with animation, the JPEG will yield the first frame of that animation.

When resizing a transparent GIF the animation might not have the expected result, instead fetch the original image.

http://media.example.com/media/image-200x300-crop.jpg

Exactly 200x300, cropped as necessary, with crop point at centre and middle.

http://media.example.com/media/image-200x300-crop=lm.jpg

The image format to return is determined by the given extension.
jpg, png, gif, webp, and jp2 are supported.

As for crop, but with a custom crop point. Accepted values are:

For the first character:

• l: Left

• c: Center

• r: Right

For the second character:

• t: Top

• m: Middle

• b: Bottom

  http://media-server.com/media/image-200x300-fill=255,124,123,1.jpg

Resize the image proportionally, and pastes it onto a canvas 200x300 pixels,
with a background rgba(255,124,123,1).

Resizer will also accept three numbers for a RGB colour.

http://media.example.com/media/image-filter=greyscale.jpg

Providing filter=greyscale will convert the image to black and white. It can combined with the other parameters but must always be placed last.