Download and install the latest version of Filestar.
Right click on one or more Dat file(s) on your desktop and select Convert with Filestar.
Type convert to png in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.dat -c "convert to png" (how).
Let your AI agent convert zlib Compressed Data to PNG
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:
“Convert the zlib Compressed Data files in my Downloads folder to PNG”
Or run it yourself:
filestarcli -i file.dat -c "convert to png"
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 convert zlib Compressed Data to PNG?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.dat -c "convert to png" on your computer, so your files stay on it.
A raw zlib (RFC 1950) compressed stream: a 0x78 header byte (commonly 78 9C), a deflate body and an Adler-32 checksum at the end. Filestar inflates the stream and then converts whatever the decompressed data turns out to be - often an image or a document.
A PNG file is an image file stored in the Portable Network Graphic (PNG) format. It contains a bitmap of indexed colors and uses lossless compression, similar to a .GIF file but without copyright limitations. PNG files are commonly used to store graphics for web images.
