WEBP to PNG

The usual reason is simple incompatibility. You saved an image from a website, and now Photoshop, PowerPoint, your printer's upload form or an older Android phone refuses to touch it. PNG is the safest possible answer to that problem: it has been universally supported since the late 1990s and, unlike JPG, it preserves transparency, so a logo with a see-through background survives the trip. The other common reason is editing. WebP is lossy by default, and every save cycle degrades it a little further. Converting once to PNG gives you a lossless working file you can crop, retouch and re-save as many times as you need without the image quietly deteriorating underneath you.

A WebP that was 180 KB can easily land at 900 KB as a PNG, and nothing has gone wrong when it does. WebP achieves its size by discarding image data; PNG is forbidden from discarding anything. You are trading bytes for compatibility and for a file that will not degrade further. If the resulting size is a problem and you do not need transparency, converting to JPG instead will be far smaller, and if you only wanted to shrink the file rather than change its format, the compressor is the better tool.

WebP can hold an animation, much like a GIF. A still format such as PNG cannot represent that, so an animated WebP converts to its first frame only. If you need the movement preserved, convert to GIF rather than PNG. If you specifically want every frame as a separate image, that is a different job than this tool does.

Both WebP and PNG store a full 8-bit alpha channel, so soft edges, drop shadows and anti-aliased text all convert cleanly. There is no flattening step and no background colour to choose, because nothing needs filling in. This is the main practical advantage of converting WebP to PNG rather than to JPG, which would have to paint something solid behind every transparent pixel.

WebP is Google's 2010 image format, and it is unusual in offering both lossy and lossless modes plus transparency in a single container. In practice it lands roughly 25–35% smaller than an equivalent-quality JPG, which is why it spread quickly across the web once Safari added support in 2020. Its weakness is outside the browser: plenty of desktop software, older phones and printing workflows still will not open a .webp file.

PNG is a lossless format built in 1996 as a patent-free replacement for GIF. Nothing is discarded when it compresses, so an image can be opened and re-saved indefinitely without degrading, and it carries a full alpha channel for soft-edged transparency. That fidelity costs space: a photograph stored as PNG is typically several times larger than the same photo as JPG, which is why PNG is the right choice for screenshots, logos and line art rather than camera output.