WebP vs PNG

WebP can be lossless with alpha and is often smaller than PNG for the web. PNG remains the interchange format that every editor still handles without thinking.

Ship WebP (or AVIF) to browsers you have tested. Keep PNG as a master for UI assets when lossless editing matters. ConvertPass encodes WebP only when the browser can.

Size

WebP. Often smaller, even in lossless mode, for many graphics.

PNG. Predictable, sometimes bulky.

Tooling

WebP. Fine in current browsers; some design tools still export PNG first.

PNG. Universal.

Animation

WebP. Animated WebP exists; support is a separate checklist.

PNG. APNG is uneven. GIF is the historical default.

Metadata

WebP. Possible, but canvas export drops it.

PNG. Text chunks are a feature and a leak.

Topic	WebP	PNG
Size	Often smaller, even in lossless mode, for many graphics.	Predictable, sometimes bulky.
Tooling	Fine in current browsers; some design tools still export PNG first.	Universal.
Animation	Animated WebP exists; support is a separate checklist.	APNG is uneven. GIF is the historical default.
Metadata	Possible, but canvas export drops it.	Text chunks are a feature and a leak.

Related tools

Image converter
Convert images on-device, with honest limits for animation and AVIF support.
Image compressor
Auto-compress locally to the smallest high-quality JPEG, WebP, PNG, or AVIF.

Related formats

Last reviewed 16 August 2026.