Invert PNM Image - Transform Colors | Online Free DevTools by Hexmos
Invert colors within PNM images with pnminvert. Adjust greyscale values and create visually altered images effortlessly. Free online tool, no registration required.
pnminvert
Invert a PNM image. More information: https://netpbm.sourceforge.net/doc/pnminvert.html.
- Invert the colors or greyscale values in a PNM image:
pnminvert {{path/to/input.pnm}} > {{path/to/output.pnm}}