About ImageOptim

Compress images using the ImageOptim API

Category Photo/Video/Audio
Modules that perform some function related to media such as photos and audio/video.
Release StateBeta
Close to stable, but users are advised to be cautious and test thoroughly.*
Module Version0.1.0
Class NameImageOptim
Date AddedMarch 24, 2018
Last UpdatedApril 13, 2018
Recommended ByNew recommendations may take up to 1 day to appear.


This module's files should be placed in /site/modules/ImageOptim/
How to install or uninstall modules


ProcessWire ImageOptim

This ProcessWire module is a wrapper around ImageOptim, a service that compresses and optimizes images in the cloud. ImageOptim currently handles JPG, PNG and GIF files.

Please refer to their site for API details and pricing information.

Module configuration screen


Install the module like any other ProcessWire module, by either copying the folder into your /site/modules/ directory or installing it via the admin.

Register with ImageOptim

To compress images, you first need to sign up for an ImageOptim account. They offer a free trial.

If you already have an account, you can find your username in the ImageOptim dashboard.


See Usage for detailed instructions and all API parameters.

Images can be optimized by calling the optimize() method on any image. The module also has an automatic mode that optimizes all image variations after resizing. This is the recommended way to use this module since it leaves the original image uncompressed, but optimizes all derivative images.

Module options

The compression level can be set globally. Alternatively, compression settings can be set per filetype, e.g. medium quality for JPEGs and low quality for PNGs. For details, see the module configuration screen.

Optimized files are renamed: *.jpg becomes *-optim.jpg. This suffix can be configured in the module settings.

Note that in automatic mode, files are not renamed but swapped in place.

Additional resources