Convert PNG to JPEG
You can convert PNG image to JPEG as well as to variety of other formats with free online converter.
Portable Network Graphics
| File extension | .png |
| File category | images |
| Description | PNG – is a scan-line graphic format developed as an alternative to GIF, which had a commercial license. It is based on the best features of the predecessor, including lossless compression and transparent background support. The PNG technology ensures the preservation of all stages of editing and the restoration of the step with the preservation of quality. However, it does not allow to save several pictures in one file at once, which limits its use in the development of animated images. |
| Technical details | The PNG extension was proposed as a tool that helps to transfer and store images on the World Wide Web. The technology is limited to an 8-bit transparency channel, so you can adjust the colors from opaque to transparent. It supports 24-bit RGB colors, matching images and shades of gray. However, as a non-professional format, PNG can not display other color spaces. Most programs allow to open such files, they can also run in any browser. Images are different in small weight with good quality. |
| Programs |
Apple Preview Microsoft Windows Photos Adobe Photoshop CC Corel Paint Shop Pro Microsoft Windows Photo Gallery Viewer |
| Main program | Microsoft Paint |
| Developer | PNG Development Group (donated to W3C) |
| MIME type |
image/png |
Joint Photographic Experts Group
| File extension | .jpeg |
| File category | images |
| Description | JPEG – is a popular graphic format, which is characterized by a high degree of compression, which leads to a decrease in image quality. It uses the technology of encoding of smooth color renditions, providing the ability to reduce the amount of data frequently during the recording of the image. Because of the small size it is requested by the owners of websites, allowing you to save the traffic effectively. It is also frequently used in memory cards of digital video cameras. The JPEG algorithm is optimally suitable for compressing photographs and pictures, in which realistic scenes with little contrast of colors are present. It is not recommended to use this format for compression of drawings and various kinds of graphics, since a strong contrast between a number of closely located pixels provokes the appearance of visible artifacts. |
| Technical details | The procedure for compressing the digital images in JPEG format is carried out in several stages. First, the photo is transformed into a color space YCbCr, then it is divided into squares to determine the upper range of the color spectrum. Finally, the colors and brightness are coded. JPEG uses a "lossy" compression system and discrete cosine transform technology. The format acts simultaneously as the standard of ISO and the International Telecommunication Union. The file compression ratio is in the range from 10:1 to 100:1. In this case, the reduction in image quality can vary from insignificant to substantial. |
| Programs |
Adobe Photoshop Apple Preview Corel Paint Shop Pro |
| Main program | MS Paint |
| Developer | The JPEG Committee |
| MIME type |
image/jpeg |