File Extension Database

Open JPG File

JPG file extension is used by Joint Photographic Experts Group images files. JPG (aka JPEG) files contain bitmap images that are compressed using lossy format. The standard was originally established in 1994. JPEG compression utilizes discrete cosine transform, run-length encoding and Huffman coding.

The compression is lossy meaning that original image is not represented with 100% accuracy. JPEG compression works best on real world images where color and luminance changes smoothly across the picture (without sharp edges). Sharp edges usually cause "compression artifacts". Compression artifacts are forms that are not present on the original uncompressed image. They are usually visible as small dots and lines next to the sharp edges. Amount and severity of artifacts depends on the compression ratio (or quality setting) that is chosen when image is compressed. Usually smaller resulting images causes more artifacts. It's important to note that even at maximum quality setting JPEG will product some artifacts.

JPG files also contain image metadata in a form of EXIF tags. These tags contain data about image title, creation date, camera shooting conditions such as aperture, shutter speed, focusing distance etc. Recently it has become popular to "geo-tag" images - tag image with latitude and longitude of the shooting location. This can be done either by post-processing or by digital cameras that have GPS device built it.

JPEG images may have color-space information embedded in them in a form of ICM profile. This data is used by devices such as monitors and printers to correctly display color tones on the picture. Not all software supports or correctly processes color profile information. If no colorspace definition is present sRGB is usually assumed by default.

There are many applications that can open JPG files for viewing and editing. Besides native support by almost all modern operating systems these include: AcdSee, Paint.NET, Adobe Photoshop etc.

Typical JPG application file locations:

  • %SystemRoot%\System32\rundll32.exe "%ProgramFiles%\Windows Photo Gallery\PhotoViewer.dll"
  • C:\Windows\System32\rundll32.exe "C:\Program Files (x86)\Windows Photo Viewer\PhotoViewer.dll", ImageView_Fullscreen %1
  • C:\Program Files (x86)\Opera\Opera.exe "%1"
  • C:\Program Files\Paint.NET\PaintDotNet.exe "%1"
  • C:\Program Files (x86)\QuickTime\PictureViewer.exe "%1"
  • C:\Program Files (x86)\Windows Live\Photo Gallery\WLXPhotoGallery.exe /LaunchPhotoViewer /v "%1"

Typical JPG mime types:

  • ImageView_Fullscreen %1
  • image/jpeg

Frequently used application names to open JPG files:

  • Windows Photo Gallery
  • Windows Photo Viewer
  • Opera
  • Paint.NET
  • QuickTime
  • Windows Live

Frequently associated Windows objects:

  • jpegfile
  • Opera.Image
  • Paint.NET.1
  • QuickTime.jpg
  • WindowsLive.PhotoGallery.jpg.14.0

How Can I Open JPG File on Windows

How Can I Open JPG File on Mac OS

How Can I Open JPG File on Android

If you downloaded a JPG file on Android device you can open it by following steps below:

How to Open JPG File on iPhone or iPad

To open JPG File on iOS device follow steps below:

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JPG file article translations

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