Convert your PNG to WebP
Convert your PNG images to WebP, right in your browser.
Drop your files here
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Convert PNG to WebP in your browser
PNG is standardised in 1996 as a lossless web format with transparency support, medium to large depending on the image content, kept lossless. Google's WebP is the more practical choice when supported by Chrome, Firefox, Edge, Safari 14+ and 95% of modern browsers. Filzy converts PNG to WebP fully in your browser using libimagequant + Rust 'image' crate for decoding and libwebp compiled to WebAssembly for encoding. The original file never leaves your device, no upload, no tracking, no daily cap. You can drop a single file or batch dozens at once and download the result as a ZIP.
Files stay on your device
Your PNG files are decoded inside a Web Worker via WebAssembly. Nothing reaches a server, nothing is logged, no temporary copy is kept anywhere.
Quality preserved by default
Filzy decodes the PNG pixels, then re-encodes them with libwebp compiled to WebAssembly at high quality. EXIF metadata is preserved when the target format supports it.
Batch entire folders
Drop dozens of PNG files at once. Filzy converts them in parallel using your CPU cores and packages everything as a single ZIP archive.
How to convert PNG to WebP with Filzy
- 1
Drop your PNG files
Drag the files into the area above, or click to pick them. Filzy accepts standard PNG files of any reasonable size (limited only by your device memory).
- 2
Filzy converts each file locally
libimagequant + Rust 'image' crate decodes the PNG, then libwebp compiled to WebAssembly writes the WebP. Each file is processed in parallel, up to your CPU core count.
- 3
Download single files or as ZIP
Pick a WebP file to download directly, or click Download all to grab a ZIP archive. The originals on your device are not modified.