Download and install the latest version of Filestar.
Right click on one or more Pnm file(s) on your desktop and select Convert with Filestar.
Type adjust brightness in the search box.
Press Adjust.
Or let an AI agent do it: filestarcli -i photo.pnm -c "adjust brightness" (how).
Let your AI agent adjust PNM brightness
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Use Filestar to adjust PNM brightness in my Downloads folder”
Or run it yourself:
filestarcli -i photo.pnm -c "adjust brightness"
Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.
Can my AI agent adjust PNM brightness?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i photo.pnm -c "adjust brightness" on your computer, so your files stay on it.
The PNM (Portable Any Map Image) file format is a subset of the broader Netpbm format, designed for storing various types of digital images. It acts as an umbrella term for three specific types of grayscale, color, and black-and-white images, represented by PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap) formats respectively. PNM files are known for their simplicity and ease of conversion to other image formats.
