Convert PNG to JPG — Free, Fast & Private
PNG files are often 3-10x larger than equivalent JPEGs because PNG uses lossless compression. Converting to JPEG dramatically reduces file size while maintaining visual quality for photographs and complex images. This is why most websites, email attachments, and social media platforms prefer JPEG for photographic content.
MiniPx converts your PNG to JPG directly in your browser. The conversion is instant — no uploading to servers, no waiting, no queue. Files can be up to 200 MB each, and beyond that the ceiling is your own device memory rather than a server policy, which is the flip side of your images never leaving the machine. Unlike online converters such as iLoveIMG, CloudConvert, or Zamzar that upload your files to remote servers, MiniPx processes everything client-side. Your images never leave your device.
You can batch convert multiple PNG files at once — 5 per batch on the free tier, with Pro removing that cap. This is especially useful when exporting screenshots, design assets, or camera photos saved in PNG format. Each converted JPEG file shows both the original and new size so you can verify the reduction.
Note that JPEG does not support transparency. Any transparent areas in your PNG will become white in the JPEG output. If you need to keep transparency with smaller file sizes, convert to WebP instead — it supports transparency and produces files 25-35% smaller than PNG. And if you need a different target format entirely, the PNG converter covers every conversion to and from PNG in one place.
For photographers and designers, the Smart preset (quality 65%) offers the best balance between file size and visual fidelity. At this quality level, the difference from the original is imperceptible in photographs. Use Gentle (82%) when maximum quality matters, such as for print or portfolio images. One related case: a file that is already a JPEG but wears a .jfif extension needs no real conversion at all — the JFIF to JPG converter handles that Windows quirk.