How to convert JPG files to PPM online?

Step 1.

Upload JPG-file

Click "Choose File" button to select a jpg file on your computer. JPG file size can be up to 50 Mb.
Step 2.

Convert JPG to PPM

Click "Convert" button to start conversion.
Step 3.

Download your PPM

Let the file convert and you can download your PPM file right afterwards.

Information about JPG and PPM file formats

Name JPG PPM
Full name JPG - Joint Photographic Experts Group Portable Pixmap file
File extension .jpg, .jpeg, .jpe .ppm
MIME type image/jpeg image/x-ppm, image/x-portable-pixmap
Developed by Joint Photographic Experts Group Jef Poskanzer
Type of format lossy image format Image File
Description JPG 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. JPG typically achieves 10:1 compression with little perceptible loss in image quality. The portable pixmap format (PPM) is an image format designed to be easily exchanged between platforms which is used by Netpbm - an open-source package of graphics programs and a programming library, used mainly in the Unix world. The format is a lowest common denominator color image file format and is highly inefficient, containing a lot of information the human eye cant even discern. The precursor to the PPM format was the PBM format which was invented by Jef Poskanzer in the 1980s as a format that allowed monochrome bitmaps to be transmitted within an email message as plain ASCII text, allowing it to survive any changes in text formatting. By the end of 1988, Poskanzer had developed the PGM and PPM formats along with their associated tools and added them to Pbmplus. The final release of Pbmplus was December 10, 1991.
Technical details Image files that employ JPG compression are commonly called "JPG files", and are stored in variants of the JIF image format. Most image capture devices (such as digital cameras) that output JPG are actually creating files in the Exif format, the format that the camera industry has standardized on for metadata interchange. A PPM file consists of a sequence of one or more PPM images. There are no data, delimiters, or padding before, after, or between images. Each PPM image consists of the following: A magic number for identifying the file type. A ppm image's magic number is the two characters P6. Whitespace (blanks, TABs, CRs, LFs). A width, formatted as ASCII characters in decimal. Whitespace. A height, again in ASCII decimal. Whitespace. The maximum color value (Maxval), again in ASCII decimal. Must be less than 65536 and more than zero. A single whitespace character (usually a newline). A raster of Height rows, in order from top to bottom. Each row consists of Width pixels, in order from left to right. Each pixel is a triplet of red, green, and blue samples, in that order. Each sample is represented in pure binary by either 1 or 2 bytes. If the Maxval is less than 256, it is 1 byte. Otherwise, it is 2 bytes. The most significant byte is first. There is actually another version of the PPM format that is fairly rare: plain PPM format.
Associated programs Apple Safari, Google Chrome, Mozilla Firefox, Internet Explorer, Adobe Photoshop, Paint Shop Pro, the GIMP, ImageMagick, IrfanView, Pixel image editor, Paint.NET, Xara Photo & Graphic Designer. Adobe Photoshop, Corel Draw, GIMP, Netpbm
Wiki https://en.wikipedia.org/wiki/JPEG https://en.wikipedia.org/wiki/Netpbm_format