About PNG to JPG conversion
PNG is a lossless format, which is wonderful for crisp interface screenshots and diagrams but painful when a single phone screenshot weighs several megabytes. JPG trades a little invisible detail for dramatically smaller files, which is why email clients, job portals, marketplace listings, and older content management systems often insist on it. Converting PNG to JPG is usually the fastest way to get under an upload size limit.
The one real catch is transparency. JPG has no alpha channel, so any see-through pixels in your PNG need a background. Matching Sox Converter fills them with plain white before encoding, which suits logos destined for a white page or document. If your PNG relies on a transparent background for layering over other artwork, keep the PNG or choose WebP instead.
You control the trade-off with the quality slider. The default of 90 is visually indistinguishable from the original for most photos; dropping to 70–80 cuts size further and is fine for web thumbnails. Text-heavy screenshots show artifacts sooner, so keep quality high for those. Every file is decoded and re-encoded by your own browser, so nothing is sent to a server.
How to do it
- Open the converter using the button above; the Image tool opens with JPEG already selected as the output.
- Drop one or more PNG files onto the drop zone, or press Choose images to pick them.
- Leave quality at 90 for near-lossless results, or lower it if you need a smaller file.
- Optionally type a max width or height to downscale large screenshots at the same time.
- Press Convert images, then use Download on each file — names end in -converted.jpg.
