PNG to JPG Converter

A screenshot saved as PNG on a modern display can easily reach 3 to 5 megabytes. The same image as a JPG at 95% quality is typically 200 to 400 kilobytes — an 80 to 90 percent reduction. For a single file this might not matter. For an email with six attachments, a blog post with twelve images, or a product catalog with hundreds of photos, that difference determines whether people wait or leave.

PNG's lossless compression is excellent at what it's designed for: images with flat colors, sharp edges, and text. Screenshots, diagrams, and UI mockups compress well as PNG because the algorithm can efficiently encode large areas of identical pixels. Photographs are the opposite — millions of slightly different pixels, gradients, noise — and lossless compression struggles with them. A photograph that is 4MB as a PNG might be 350KB as a JPG with no visible quality difference to the human eye.

The one thing to understand before converting: JPEG does not support transparency. Any transparent or semi-transparent areas in your PNG — a logo on a clear background, a product photo with a removed background — will be replaced with solid white in the JPG output. If you need transparency preserved, WebP is the right target format instead of JPG. If you're converting a photograph with no transparent areas, this limitation doesn't apply.

Converting happens entirely in your browser. The PNG is decoded using the browser's native image engine, drawn onto a Canvas with a white background layer (which handles the transparency replacement), and encoded as JPEG at 95% quality. No file is sent to any server. The conversion completes in under a second for files up to several hundred megabytes, limited only by your device's memory.