Convert JPG images to PNG format for free. Get lossless quality with transparency support.
Drag & drop files here
or Browse Files
Max file size: 10MB · Max 2 files at once
Every time you re-save a JPG, it loses a little more quality. If you need to edit an image multiple times or add transparency, you need a lossless format. ConvertFile converts JPG to PNG in your browser with zero quality loss from the conversion itself.
Select or drag and drop your JPG file
Preview the image
Click Convert and download your PNG
JPG re-compresses the image every time you save it, causing gradual quality degradation called generation loss. Converting to PNG stops this cycle. The PNG output preserves the image exactly as it is, with no further compression artifacts.
PNG also supports transparency (alpha channel), which JPG cannot. If you need to remove a background, overlay an image on another, or use an image in a design tool, PNG is the required format. Expect the file to be 2-5x larger than the JPG source, since PNG uses lossless compression.
| Aspect | JPG | PNG |
|---|---|---|
| Compression | Lossy | Lossless |
| File Size (photo) | 200-500 KB | 1-5 MB |
| Transparency | No | Yes (alpha channel) |
| Best For | Photos, web images | Screenshots, logos, graphics |
| Browser Support | All browsers | All browsers |
| Edit Safety | Quality degrades on each re-save | No quality loss on re-save |
JPG (JPEG) is the most widely used image format on the web. It uses lossy compression to produce small files, discarding visual information that the human eye is unlikely to notice. At 85-90% quality, most people cannot tell the difference between a JPG and the original. JPG does not support transparency, and re-saving a JPG repeatedly causes gradual quality loss, a process called generation loss.
PNG (Portable Network Graphics) is a lossless image format created in 1996 as a patent-free alternative to GIF. It supports full-color images with an alpha channel for transparency. PNG files preserve every pixel exactly, which makes them ideal for screenshots, logos, UI elements, and graphics with sharp text. The trade-off is file size: PNG images are typically 3-5x larger than equivalent JPG files for photographic content.
ConvertFile uses the HTML5 Canvas API to convert images directly in your browser. Your JPG files are never uploaded to a server. The conversion runs on your device's hardware, which is why it finishes in under 2 seconds. Once you close the tab, the converted files are gone from memory.
No. Converting to PNG preserves the current quality without further loss, but it cannot restore detail already discarded by JPG compression. Think of it as putting the image in a safer container, not repairing it.
Three main reasons: you need transparency support, you want to edit the image without accumulating more compression artifacts, or your workflow requires a lossless format. PNG is the standard for screenshots, graphics, and images with sharp text.
Yes. PNG files are typically 2-5x larger than JPG for photographic images because PNG uses lossless compression. A 300KB JPG photo might become 1-2MB as a PNG.
Yes. Once in PNG format, you can open the file in any image editor (Photoshop, GIMP, Figma) and add or modify the alpha channel for transparency.
Completely. Everything runs in your browser using the Canvas API. No files are sent to any server. You can verify by checking your browser's network tab during conversion.
Keep JPG if you are sharing photos online, attaching images to emails, or storing large photo collections where file size matters. JPG is the right choice when you do not need transparency or lossless editing.
Yes. JPG and JPEG are the same format with different file extensions. Both work identically with this converter.
No. The output PNG has the exact same width and height as the input JPG. Only the file format and compression method change.