Image & Video Manager has three tools that can help you to troubleshoot issues:

• Piez
• Perceptual quality previews
• Image & Video Manager dashboard

Each provides certain insights into what is actually happening to your images and videos.

Piez

Use Piez to gather additional information about your images and videos, including:

• The number of images and videos optimized on a webpage
• The total bytes saved for all processed media
• The percentage reduction in bytes for all processed media
• The size of an original (pristine) image or video
• The size and format of the derivative image or video
• Whether a derivative image or video has been real-time or offline optimized

Perceptual quality previews

Use perceptual quality previews to help determine why images were converted to an unexpected format.

Image & Video Manager dashboard

Use the Image & Video Manager dashboard to:

• Understand why images on mobile are heavier than expected
• See which pristine images and videos could not be processed, and why