WebP Converter — Free, Fast & Private
WebP is a modern image format developed by Google that produces significantly smaller files than JPEG and PNG. Converting your images to WebP can reduce page load times and bandwidth usage by 25-35% compared to JPEG.
MiniPx converts in both directions. Convert JPG and PNG to WebP for web delivery, or convert WebP back to JPG and PNG for compatibility with apps and services that do not yet support WebP.
WebP supports both lossy compression (like JPEG) and transparency (like PNG), making it versatile for all types of web images. A single format that handles photos, graphics, and icons with transparency.
Browser support for WebP is now near-universal. Chrome, Firefox, Safari, Edge, and all major mobile browsers support WebP. The main compatibility gap is with older desktop applications like Photoshop (pre-2022) and some email clients.
All conversion happens in your browser. Your images are never uploaded to any server. MiniPx handles batch conversion — add multiple files and convert them all at once.
What a WebP file actually is
WebP is a container built on the VP8 video codec, which is why it does something JPEG and PNG cannot: it holds either lossy or lossless data, and either way it can carry an alpha channel. Before WebP you chose between transparency (PNG, large) and efficient photographic compression (JPEG, opaque). WebP removes that trade.
Practically: a lossy WebP is typically 25–35% smaller than a JPEG of matching visual quality, and a lossless WebP is usually around 20–26% smaller than the equivalent PNG. It also supports animation, which is why it has largely replaced GIF on the web — an animated WebP is a fraction of the size of the same animation as a GIF, with full colour instead of a 256-entry palette.
The one thing to watch is that WebP is a web format. Browsers and modern operating systems handle it, but plenty of desktop software, print workflows and government upload portals still do not. If a file has to be accepted by something other than a browser, convert it to JPEG first. For anything staying on the web, WebP is close to a free win — and it can store colour at full resolution, unlike JPEG.
For the format comparison itself, WebP vs PNG vs JPEG works through where each one wins on real images.