Pixpress
Pixpress
Drag in one picture or a whole batch, tap to browse, or paste with ⌘/Ctrl + V. JPEG, PNG, WebP, AVIF, GIF and BMP are all accepted. Nothing is uploaded — the files are read straight into this tab.
A background worker decodes each image to raw pixels on your device and keeps them in memory, so tweaking the quality or format re-encodes instantly without re-reading the file.
The same engines desktop optimisers use — MozJPEG, WebP, AVIF and OxiPNG, compiled to WebAssembly — squeeze the file far smaller than a plain "Save As". Optionally cap the longest edge to shrink huge camera photos further.
Drag the before/after slider to see exactly what you're trading for the smaller file. Then save it, copy it, share it (on mobile), or grab the whole batch as a ZIP. It all happened without a server.
Pixpress is built so your images physically cannot reach us — there is no server that could receive them. Here's exactly what that does and doesn't cover.
Want to be certain? Turn off your Wi-Fi after the page loads — Pixpress keeps compressing. Nothing is going anywhere.
Most "compress image online" sites make you upload every picture to a server you know nothing about, then watermark the result or cap the batch. Pixpress does the same job — shrinking and converting JPEG, PNG, WebP and AVIF — without a single byte leaving your device.
It runs the same best-in-class encoders desktop tools use (MozJPEG, WebP, AVIF, OxiPNG) as WebAssembly, entirely inside your browser. No accounts, no watermarks, no batch limits, no server. Once loaded it even works offline.