How to convert JPEG to PNM
- Add your .JPEG file - drop it in the box above or click to browse.
- Convert it to .PNM in a few seconds.
- Download your new .PNM file.
What to expect
- Color is preserved in the color (PPM) variant; the conversion does not discard channels for a color source.
- No compression means the file is far larger than the original JPEG.
- Existing JPEG artifacts remain in the pixel data.
Frequently asked questions
Does converting JPEG to PNM keep the color?
Yes, for a color photo the result is a PPM-type PNM that retains the RGB color, since PNM is an umbrella format covering black-and-white, grayscale, and color sub-formats. The pixel values match the JPEG source.
Why convert a JPEG to PNM?
PNM is a very simple, uncompressed raster format that is easy for image-processing tools and scripts to read and write, so it is common as an intermediate in such pipelines. It is not intended as a delivery or display format.
Where can I open a PNM file?
Free viewers like GIMP, IrfanView, and XnView open it on any platform, and Netpbm command-line tools handle it directly. For general storage or sharing it is usually converted to PNG or JPEG.
What is the downside of PNM?
Because it stores pixels uncompressed, a PNM file is much larger than the equivalent JPEG. It also carries over the JPEG's existing compression artifacts without cleaning them up.
Programs that convert JPEG: Adobe Photoshop · GIMP · Ability Photopaint · GIMP for Mac · Adobe Photoshop for Mac · GIMP for Linux · Picture Resize Free Online Images Converter
