Convert WEBP to PNG
Converting WEBP to PNG decodes a WebP image and re-encodes the identical pixels as a PNG, a lossless format that every image editor and operating system understands. This tool performs the conversion locally in your browser, keeps the alpha channel intact, and never uploads your files. It is the right choice when you need transparency preserved or plan to keep editing the image.
How it works
A WebP file is a RIFF container whose image data is compressed with the VP8 codec (lossy), the VP8L format (lossless), and optionally an ALPH chunk carrying a separately compressed alpha channel. Your browser already knows how to read all of this — WebP decoding has shipped in every major engine for years — so when you choose a file, the browser itself decompresses the bitstream into a rectangle of RGBA pixels: red, green, blue, and an 8-bit alpha value per pixel.
The tool then draws that decoded image onto an HTML canvas backed by an RGBA buffer of the same width and height. Unlike the JPG route, nothing is composited onto a background here: the alpha values ride along untouched. The canvas is exported as image/png, which runs the PNG encoder — pixels are filtered row by row (each row stored as differences from its neighbors to make the data more compressible) and then compressed with DEFLATE, the same algorithm used by ZIP. PNG compression is lossless by definition: decoding the output reproduces the canvas buffer bit for bit.
The practical consequence is that the PNG is a perfect snapshot of what your browser decoded, but not necessarily of some pristine original. If the source WEBP was saved lossily (most are, since that is WebP's main advantage on the web), its quantization artifacts are frozen into the PNG faithfully. Converting to PNG stops any further generational loss — you can now open, edit, and re-save the file indefinitely without degradation — which is exactly why PNG is the right intermediate format for editing workflows.
Expect larger files. DEFLATE dates to 1996 and cannot compete with WebP's spatial prediction on photographic content; a photo often grows five- to ten-fold. For screenshots, UI graphics, and logos with large flat areas, PNG's filtering works well and the growth is modest.
Worked example: a logo with a soft drop shadow
A designer receives client-logo.webp, 900×300 pixels with a semi-transparent drop shadow, exported by a web team at 24 KB. Their editing tool does not open WebP. Converting on this page yields client-logo.png at 61 KB — larger, as expected, but still small because the flat brand colors compress well under DEFLATE. Placed over a dark slide background, the shadow blends smoothly: the 142 distinct alpha values along its gradient survived the trip intact. Had the JPG route been used instead, the shadow would have been flattened onto a white box. Total conversion time was under 50 ms, entirely offline.
Frequently asked questions
Does WEBP to PNG conversion keep transparency?
Yes. PNG supports a full 8-bit alpha channel, and this tool copies every pixel's transparency value from the decoded WebP straight into the PNG. Soft shadows and semi-transparent edges come through unchanged.
Is PNG output truly lossless from a WEBP source?
The PNG stores exactly the pixels your browser decoded from the WebP, with no further quality loss. If the WebP itself was lossy-compressed, its existing compression artifacts are preserved as-is; converting cannot restore detail that was already gone.
Why is my PNG so much larger than the WEBP was?
PNG's DEFLATE compression is far weaker than WebP's video-derived coding, especially for photos. A 150 KB photographic WEBP can easily become an 800 KB to 1.5 MB PNG. For graphics with flat colors the gap is much smaller.
Do my WEBP files leave my computer during conversion?
No. Decoding and PNG encoding both happen inside your browser using its built-in image machinery. The page works with the network disconnected, and nothing is transmitted or stored on a server.
Should I convert WEBP to PNG or to JPG?
Choose PNG when you need transparency, plan to edit the image further, or are converting screenshots, logos, or diagrams. Choose JPG for photos you just want to share, where smaller files matter more than pixel-perfect fidelity.
Can I batch convert several WEBP files at once?
Yes, you can select multiple WEBP files in one go and each is converted to its own PNG on your device. Since processing is local, speed depends on your computer, not on an upload queue.