Open source Project note
Bronto Layout
Check the layout relationships that a page needs to preserve.
An image can drift below its text without causing page overflow. Bronto Layout lets you define that alignment as a rule, check it at selected browser widths, and receive the measured difference. The local CLI and TypeScript engine produce structured reports for developers, CI, and coding agents. Existing Playwright tests can reuse their own page state.
Availability
Bronto Layout is experimental, MIT-licensed software. Browser checks require Node.js 22+ and an installed Chrome or Chromium. The repository contains installation instructions, release assets, and a reproducible alignment example. It does not repair CSS automatically or certify an entire visual design; unmeasured surfaces remain explicit limitations.