Convert JPG to PNG offline
Convert local JPG files to PNG files offline by JavaScript in your web browser without any software downloads or file uploads!
| # | File Name | File Size | Actions |
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How to convert JPG to PNG offline
Choose local JPG image files, choose "PNG" as target image format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. Each file can be up to 2GB.
This offline converter will try to use canvas in web browser to convert images first. The image format depends on whether your current web browser supports. For example: the latest Chrome browser supports AVIF images while some old versions don't. Then the offline converter will try to use JavaScript to convert images if your current web browser doesn't support the image format. Use online converter instead if this offline converter doesn't work in your web browser.
| Name | JPG | PNG |
| Full name | Joint Photographic Experts Group | Portable Network Graphics |
| File extension | .jpg, .jpeg, .jpe, .jif, .jfif, .jfi | .png |
| MIME | image/jpeg | image/png |
| Developed by | Joint Photographic Experts Group | PNG Development Group |
| Type of format | Lossy image format | Lossless bitmap image format |
| Introduction | JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. JPEG typically achieves 10:1 compression with little perceptible loss in image quality. | Portable Network Graphics (PNG) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most used lossless image compression format on the Internet. PNG itself does not support animation at all. MNG is an extension to PNG that does; it was designed by members of the PNG Group. |