Useful Constants for the EWWW Image Optimizer Plugin

The EWWW Image Optimizer plugin is a commonly used plugin and service for optimizing images on your WordPress website. The plugin includes a large number of constants that can be defined in your site’s wp-config.php file.

EWWW Image Optimizer Plugin

If you want to enable the native lazy loading in the EWWW Image Optimizer plugin, then you can use this constant;

define( 'EIO_ENABLE_NATIVE_LAZY', true );

To disable the lazy loader auto-scaler, you can use this constant;

define( 'EIO_LL_AUTOSCALE', false );

To load the lazysizes.js file in the header rather than the footer, then use this constant;

define( 'EIO_LL_FOOTER', false );

To disable the check for JPG to PNG image conversion, then use this constant;

define( EWWW_IMAGE_OPTIMIZER_JPG_TO_PNG', false );

To preserve metadata and stop it from being removed during image optimization of images then, use this constant;

define( 'EWWW_IMAGE_OPTIMIZER_METADATA_REMOVE', false );

WordPress in version 4.5 decreased the JPG image quality from 90 to 82. To define a specific image quality level for JPG images when image optimized, then set this constant and adjust as needed;

define( 'EWWW_IMAGE_OPTIMIZER_JPG_QUALITY', 90 );

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Knowing all the constants that the EWWW Image Optimizer plugin supports will make it easy to understand how to disable and enable specific features within the plugin.

Useful Links

• https://docs.ewww.io/article/40-override-options
• https://docs.ewww.io/article/74-lazy-load
• https://docs.ewww.io/article/12-jpg-quality-and-wordpress
• https://wordpress.org/plugins/ewww-image-optimizer/