A Designer's Checklist for Delivering Web-Ready PNG-to-WebP Images

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The author argues that poor image performance usually stems from handoff problems between designers and developers, not from the conversion tool itself. Designers should export sources at twice the intended display width so they stay sharp on zoom and high-density screens, and flatten photos and full-bleed images to remove unnecessary transparency. WebP versions should be delivered alongside the PNG originals with matching filenames as a standard part of the deliverable. Each asset should be documented with its display width, transparency requirement, and source location, and developers should run a short check for layout shift, legibility, transparency rendering, and sane file sizes. The author also recommends browser-local conversion so unreleased or confidential assets never leave the user's machine.

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