Convert WebP to PNG

Why convert to this format?

WebP is a modern web format that is typically 25–35% smaller than JPG or PNG at the same quality, with transparency. PNG is a lossless format with an alpha channel — pixel-perfect for logos, screenshots and line art.

OptImg runs the same Rust codecs desktop tools use, compiled to WebAssembly, so you get desktop-grade PNG output at a sensible default (lossless output) — adjustable at any time — without ever uploading your image.

Everything happens locally: your WebP is decoded, re-encoded to PNG and handed straight back as a download. No server sees a single byte, which is why there's no queue and no file-size cap.

Frequently asked questions

Is my WebP uploaded to a server?

No. The WebP-to-PNG conversion runs entirely in your browser with WebAssembly — your file never leaves your device, there is no queue, and no size limit beyond your device's memory.

Will converting to PNG change the image?

PNG output is lossless, so every pixel the decoder reads is preserved exactly — and the file is optimized with oxipng for the smallest lossless size. A “smaller file” toggle can quantize to a palette when you want extra savings.

Is the WebP to PNG converter free?

Yes — completely free, with no signup, no watermark and no cap on how many files you convert. There is nothing to install; it runs in your browser.