Turn a Kindle into a second screen for your Mac.

--tone-mode 4gray --refresh-ms 333

A simulation in your browser. The Mac side animates freely; the Kindle side changes only when a frame is captured.

kindle-screen serves a live capture of one Mac display over HTTP, so the Kindle's web browser on the same network can show it as a simple second screen. The Mac keeps rendering the real display; a small Rust server captures it in the background, converts it to Kindle-friendly grayscale and always serves the latest frame.

Install

From source cargo run --release

What it does

Captures a chosen display with macOS screencapture, mouse cursor included, every 333 ms by default.
Rotates, resizes and converts each frame for e-ink: grayscale, 4gray or bw, with optional contrast and sharpening.
Open http://<your-mac-lan-ip>:3000 in the Kindle browser. Nothing to install on the Kindle.

What it leaves out on purpose

No Kindle app or jailbreak: it is a web page the stock browser can open.
macOS only, and the process that runs it needs Screen Recording permission.