Why convert WebP to PNG?
WebP is excellent for the web but not universally accepted by every tool. Common reasons to convert: (1) older versions of Photoshop, Word, and PowerPoint refuse WebP imports — PNG works everywhere; (2) some print services, marketplaces, and CMSes require PNG/JPG only; (3) you need to share the image with someone on Safari < 14 or Internet Explorer where WebP fails to render; (4) you want a format compatible with every existing photo workflow, including legacy desktop apps; (5) WebP is harder to inspect manually with hex tools and image debuggers.
Is the conversion lossless?
Yes — the WebP → PNG step is lossless. PNG uses DEFLATE (zlib) compression, the same algorithm as ZIP, which preserves every byte. However, if the source WebP was lossy (encoded with a quality less than 100), the WebP encoder already discarded perceptual detail when the file was first saved. Converting to PNG cannot recover that detail; it only ensures no further loss happens. PNG identical to what your browser sees when it decodes the WebP.
Is transparency preserved?
Yes. WebP supports an 8-bit alpha channel, and PNG does too — every transparent and semi-transparent pixel maps directly. The canvas decode-then-encode pipeline preserves alpha exactly. Drop a WebP with rounded corners, drop shadows, or anti-aliased icons and the PNG output will have identical alpha.
Why is the PNG much larger than the WebP?
WebP achieves 25–35% smaller files than JPEG and 50%+ smaller than PNG at equivalent quality, using sophisticated VP8/VP8L compression that PNG cannot match. PNG must store every pixel exactly (lossless RGBA + DEFLATE), while WebP can use lossy DCT-like coding plus advanced lossless tricks. Expect a typical photo WebP at quality 0.85 to balloon 4–8× when re-encoded as PNG. This is normal.
Is my image uploaded to your servers?
No. Conversion runs entirely in your browser using HTML5 Canvas and the native toBlob API. The WebP is read with FileReader, decoded by the browser (modern Chrome/Firefox/Safari/Edge support WebP), drawn to a canvas, and re-encoded as PNG. Open DevTools → Network and click Convert: zero requests are made.
Why does my Safari browser fail to decode the WebP?
Safari added native WebP decoding in version 14 (released September 2020 with macOS Big Sur 11 and iOS 14). Earlier Safari and iOS versions cannot render WebP — the image element fails to load. If the converter reports a decode error in Safari, update to Safari 14+ or use a different browser. Chrome, Firefox, and Edge have supported WebP since 2010, 2019, and 2018 respectively.
How big a WebP can this tool handle?
Browser memory and the maximum canvas dimensions are the constraints. Most browsers support canvases up to 16,384 × 16,384 px (Chrome) or 11,180 × 11,180 px (Safari). A 4K (3840×2160) WebP decodes and re-encodes in under a second on any modern device. Be aware: a 24 MP RGBA buffer is 96 MB in RAM, and the resulting PNG can be 50–100 MB on disk. There is no server-imposed file size limit because no upload happens.