A JPEG compressor reduces the memory size of a JPEG image and can perform general editing functions. It can convert other image files to JPEG but may not preserve their original format. Over-compression can result in pixel degradation and artifacts. Previewing the compression is recommended.
A Joint Photographic Experts Group (JPEG) file is a versatile image used for websites and desktop displays, and a JPEG compressor is a tool that helps reduce the memory size of the JPEG. In addition to reducing the amount of memory that such an image requires, a JPEG compressor may be able to do some general purpose editing. Conversion functions are common among JPEG compressors, so other images can be edited in the JPEG format. This program is normally able to keep some of the original image quality but, if someone starts with a low quality image or compresses the image too much, the JPEG may be blurry and full of artifacts.
The main function of a JPEG compressor is to squeeze a JPEG image so that less memory is required to load and hold the image. This is commonly done by zooming out of the image and reducing its size. This can also be accomplished by increasing the pixel size or reducing the quality, and this change is often imperceptible when done correctly.
Most JPEG compression programs are capable of general purpose editing. This may include resizing the image, flipping or rotating it, and adding text. There are very few compressors that have advanced tools, such as those used for graphic design or illustration, although there are some design programs that have a compression function.
While a JPEG compressor is only created to work with and compress JPEG images, there are many other common image files that are used for a multitude of purposes, such as for high-quality prints, small animations, or internet usage. Most of these programs are able to compress and convert these files to JPEG, but rarely can they compress the image and keep it in its original format. For example, this compressor can usually convert a Graphic Interchange Format (GIF) to a JPEG and then compress it, but it can rarely compress a GIF and keep it as a GIF.
If a JPEG is only slightly compressed, most people won’t notice any difference in quality. When the image is compressed too much, the quality and pixel size degradation will be noticeable. Large pixel or artifacts can appear in the JPEG, the image can become blurry, and continuous compression can transform the image into an amorphous blob of pixels and color. To avoid this, users should preview the JPEG compression before using the image on a website or printing it.
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