Convert JPG to PNG offline by JavaScript

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!

Files:

Target:

Size:

Quality:

OUTPUT FILES:

#	File Name	File Size	Actions

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. File size 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.

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.