Chromatic

Chromatic is a visual testing and review platform for UI components, built by the team behind Storybook, that automatically catches unintended visual changes in your interface and streamlines reviewing UI. While traditional tests check logic and functionality, they often miss visual regressions — a button that shifted, a layout that broke, a color that changed — which can degrade the user experience without anyone noticing until it's live. Chromatic solves this by capturing and comparing the visual appearance of your components and pages, flagging any differences for review.

The platform integrates with Storybook (the popular tool for developing and documenting UI components) and your CI pipeline to take snapshots of your components and pages across states and browsers, then compares them against baselines to detect visual changes. When something looks different, it surfaces the change for a human to review and approve or reject, ensuring that visual modifications are intentional. This automated visual testing catches regressions that functional tests miss, and the review workflow makes it easy for teams — including designers — to collaborate on UI changes, providing a shared place to see and sign off on how the interface looks.

Chromatic is used by frontend and design teams that care about UI quality and consistency and want to catch visual bugs automatically while streamlining UI review and collaboration. By providing visual testing and a review process tied to Storybook, it helps teams ship interfaces with confidence that they look right across states and browsers, and it bridges the gap between developers and designers around UI changes. As component-driven development and design systems become standard and visual quality matters more, automated visual testing is increasingly valuable. For frontend teams — especially those using Storybook — that want to catch visual regressions and review UI changes efficiently, Chromatic offers a powerful, well-integrated and genuinely useful solution.