What is a .PNM file?
PNM is any of the Netpbm image types - bitmap, greymap or pixmap.
- Did you know
- PNM is an umbrella name for the simple PBM, PGM and PPM image formats.
- The PNM family was invented by Jef Poskanzer in the 1980s so that images could survive being mailed as plain 7-bit ASCII text.
- Each member starts with a two-byte “magic” of P followed by a digit that selects bitmap, greymap or pixmap in ASCII or binary form.
- What Analyser reads
- Decode and preview extra still-image formats in pure JavaScript - Truevision TGA, QOI, Netpbm (PPM/PGM/PBM), PCX, farbfeld, WBMP, XBM/XPM, Sun Raster and SGI are fully rendered - and read header metadata from codec-heavy formats: Radiance HDR, DirectDraw Surface (DDS) game textures, OpenEXR, JPEG 2000, JPEG XR, EPS/PostScript, Windows WMF/EMF metafiles, Apple ICNS icons, CUR/ANI cursors, MNG and Lottie animations.
- Depth of analysis
- .PNM is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .PNM file
- Drag a .PNM file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.