A Rust CLI and rendering library for working with ESC/POS byte streams. Render to PNG, emulate a RAW TCP printer, manage device profiles, and print over USB or port 9100.
$ escpost --help Usage: escpost <COMMAND> render Render a known byte stream print Send bytes unchanged to a printer serve Capture RAW TCP print jobs printers List and configure targets profiles Query the embedded profile catalog
Six components cover the path from inspecting a byte stream to integrating local hardware and production cloud printing.
A single Rust executable for interactive terminals and unattended scripts. The renderer and profile catalog are separate Rust crates, with a thin PyO3 binding for Python applications.
escpost serve exposes a local RAW TCP printer. Point an application at it exactly as you would at network hardware and inspect the captured job in the browser viewer.
Discover printer-class USB interfaces or configure known RAW TCP endpoints. Named targets keep transport details out of scripts and receive the original bytes unchanged.
Profiles define paper geometry, supported symbols, carriage-return behavior, and calibrated quirks. Query the embedded catalog or use REFERENCE when no physical target is known.
Render to deterministic one-bit PNG sheets or inspect results in the embedded browser workbench. Cuts create separate sheets; watch mode rerenders changed sources.
Use ESCPost while developing ESC/POS integrations for Receiptful, Duala Digital's managed cloud printing service, then connect receipt workflows to deployed printers.