Convert JPG photos to lossless PNG format. Add files, convert instantly, and download. Runs entirely in your browser - files never leave your device.

JPG (JPEG) is a lossy format optimised for photographs. Every time a JPG file is re-saved, the image loses a small amount of detail due to lossy compression. PNG, on the other hand, uses lossless compression - no data is discarded, so the image remains pixel-perfect.
Converting JPG to PNG is useful when you need to edit an image further without accumulating compression artefacts, when a platform requires PNG uploads, or when you want to add transparency later in a graphics editor.
Keep in mind that converting a JPG to PNG does not restore detail already lost during the original JPG compression. The resulting PNG will be a faithful, lossless copy of the JPG - but at a larger file size.
This tool processes everything locally in your browser. Your images are never uploaded to any server.
Three simple steps:
Common use cases for JPG-to-PNG conversion:
| Feature | JPG | PNG |
|---|---|---|
| Lossy compression | ||
| Lossless compression | ||
| Transparency (alpha channel) | ||
| Animation support | ||
| Web browser support | All browsers | All browsers |
| Color depth | 8-bit (16.7M) | 8/16-bit |
| Compact file size | ||
| Metadata (EXIF) |
Core Web Vitals is a set of performance metrics Google uses when evaluating websites. One of them - LCP (Largest Contentful Paint) - measures the time it takes for the largest visible element to appear on screen. On many pages, that element is an image.
Converting JPG images to PNG reduces graphic file sizes, which directly shortens resource download time and improves the LCP score. Smaller files mean faster page loading - especially important on mobile devices with slower connections. Additional techniques like loading="lazy" and fetchpriority="high" speed up rendering.
Tools like PageSpeed Insights and Lighthouse identify specific files worth optimizing.
A few tips to help you avoid common issues during conversion:
Savings depend on the source file type and its original compression. Below are example results:
Camera photo
2.4 MB → 890 KB
Product image
500 KB → 185 KB
Screenshot / banner
350 KB → 230 KB
Actual savings may vary depending on image content and quality settings. The converter shows the exact size before and after conversion for each file.

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