FAQ
Questions people ask before they drop a file
Short answers for “webp to png,” “webp to jpg,” and whether this is actually local. JSON-LD on this page matches the same copy.
Does WebpUndo upload my images to a server?
No. Conversion runs entirely in your browser with createImageBitmap and canvas. Files are read locally, decoded on your device, and offered as downloads from memory. Closing the tab clears them. There is no upload API and no account.
How do I convert WebP to PNG?
Open the converter, drop one or more .webp files (or use Choose files), keep PNG checked, and download each PNG or a ZIP of the batch. Transparency is kept because PNG supports an alpha channel.
How do I convert WebP to JPG?
Drop your WebP files, check JPG, set the quality slider (default 85), then download. JPG has no transparency, so transparent pixels are flattened onto a white background so the photo does not pick up random colors.
Can I convert several WebP files at once?
Yes. The file picker and drop zone accept multiple files. Each valid WebP is converted independently. You can download one file or pack every PNG and JPG into a single ZIP.
What happens if I drop a PNG or JPEG by mistake?
WebpUndo rejects it and shows an error: only .webp files are accepted. The rest of the batch still converts. Rename tricks do not help — a file that is not a real WebP will fail to decode.
Will JPG quality change the PNG as well?
No. The quality slider applies only to JPEG encoding. PNG is lossless: the pixel data from the decoded WebP is written without another quality pass.
Does conversion reduce image resolution?
No. The canvas is sized to the source width and height from the decoded bitmap. You get the same pixel dimensions. File size changes because PNG and JPEG compress differently than WebP.
Why is the PNG sometimes larger than the WebP?
WebP (especially lossy WebP) is usually more compact than PNG. PNG stores every pixel losslessly, so a photo that looked small as WebP can grow when you need an editable, widely compatible PNG.
Which browsers work with WebpUndo?
Current Chrome, Edge, Firefox, Safari, and most Android and iOS browsers. The tool needs canvas and WebP decoding. Very old browsers without WebP support cannot preview or convert the files.
Is WebpUndo free? Do I need an account?
The converter is free and has no sign-in. It is a static site. Optional ads on article pages may appear to keep the tool available; they are not required to convert files.
Can I use the converted files commercially?
WebpUndo does not claim rights to your images. You keep whatever rights you already had. Conversion does not grant a license to copyrighted photos you do not own.
Is my conversion history stored?
No. There is no server log of files, no IndexedDB store, and no “recent conversions” list after you leave. Previews live in memory as object URLs and are revoked when you clear the list or close the page.