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font-render-client

Command-line client of the Font Render Service: send fonts (TTF, OTF, WOFF, WOFF2) to a Windows server that renders them with DirectWrite in headless Chromium, get PNG waterfalls back.

uv tool install font-render-client          # or: pipx install font-render-client
font-render login http://studio-pc:8000      # asks for your token (from the server's admin)
font-render MyFont.ttf                       # waterfall 9-24 ppem -> ./renders/
font-render A.ttf B.ttf --ppem 9-40          # compare fonts
font-render MyFont.ttf --plain --zoom 4      # text only, 4x nearest-neighbour
font-render --info                           # server and which client you are

Fonts are sent to the server and kept in its memory only; the server never writes them to disk.

Command
font-render login [SERVER] [--token T] [--admin-token T] [--dev-token T] Check the token against the server and save it (~/.config/font-render/config.toml, %APPDATA%\font-render\config.toml on Windows)
font-render login --show / font-render logout Show (tokens masked) / delete the saved settings
font-render FONT... [--ppem 9-24] [--text ...] [--scale 1.5] [--plain] [--zoom N] [--invert] Render
font-render-batch DIR_A DIR_B Render font pairs across browsers
font-render-clients list|add|rotate|disable|enable|remove Manage client tokens (admin token)
font-render --update / --rollback Update the server to the newest release / go back (admin token)

Settings can also come from the environment or a .env file in the current directory: FONT_RENDER_SERVER, FONT_RENDER_CLIENT_TOKEN, FONT_RENDER_ADMIN_TOKEN, FONT_RENDER_DEV_TOKEN; they take precedence over the saved settings.

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