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Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Chromatic is a cloud service for visual testing and review. In its Storybook workflow, it captures component stories, compares each new build with accepted visual baselines, and sends detected changes into a review process. It also documents integrations for Vitest, Playwright, and Cypress, plus interaction and accessibility checks. Those capabilities make Chromatic worth considering when a team wants visual regression testing alongside CI and pull-request review—not as a replacement for functional tests.
How does visual testing work?
Visual regression testing checks whether a UI looks different from an earlier, accepted version. Chromatic’s main workflow uses snapshots: images captured from defined UI states. The first build establishes baselines; later builds compare their snapshots with those baselines. When a difference is detected, a reviewer can inspect it and decide whether the change is intended or needs a fix.
This addresses a gap functional tests can leave. A test may confirm that a button responds to a click without noticing that a styling or layout change makes the interface confusing, obscured, or visually inconsistent. Chromatic describes its visual checks as covering appearance, layout, fonts, and colors. These are documented product capabilities, not independent test results.
How does Chromatic fit into my stack?
Storybook stories as visual test cases
In the Storybook workflow, stories represent reproducible component states and variations. Those states become visual test cases, so a component can be checked in more than one condition rather than only as it appears on a single page. The practical value depends on the states your team has represented in stories: unmodeled states are not covered by those story-based checks.
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Other documented integrations
Chromatic also documents paths for Vitest, Playwright, and Cypress. Instead of using Storybook stories as the source, these integrations capture UI archives while the tests run. The exact setup and flags depend on the integration and may change, so use the relevant current integration documentation before configuring a project.
What happens from build to review?
- Define UI states. Create Storybook stories for the components and variations you need to review, or use a documented Vitest, Playwright, or Cypress integration.
- Build and upload. In the Storybook workflow, the Chromatic CLI builds and uploads Storybook to Chromatic’s cloud. Framework integrations capture UI archives during test execution.
- Establish or compare baselines. The initial build establishes snapshots as baselines. Later builds compare new snapshots with the accepted baselines.
- Review changes. Chromatic presents changed snapshots for verification. Reviewers can accept an intended change or send an unintended one back for correction.
- Run through CI, with optional local checks. Chromatic documents GitHub Actions for CI and a Storybook Visual Tests addon for on-demand local visual tests. The addon documentation says local testing does not replace CI.
In pull-request workflows, documented test dimensions include browsers, viewports, themes, locales, and CSS media features. These dimensions can help teams assess whether a change behaves consistently across the contexts they choose to test; the available coverage is determined by the configured workflow.
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What does Chromatic check beyond pixels?
Chromatic’s product materials describe interaction tests that simulate actions such as clicking, typing, hovering, and dragging, as well as accessibility checks using axe. Its accessibility guide describes tracking violations against a baseline for each story, which can help distinguish new findings from existing ones. These checks extend the documented workflow beyond simple image comparison, but they do not make visual, interaction, or automated accessibility checks a substitute for all forms of manual review or testing.
Chromatic’s strengths and trade-offs
Where it fits well
- Repeatable component states: Storybook stories give teams a structured source of visual test cases.
- Reviewable changes: Baseline comparisons route detected differences into a reviewer-facing process rather than leaving teams to spot them in a raw image diff.
- CI and pull-request workflow: The documented GitHub Actions route and PR review process suit teams that want checks connected to code changes.
- Multiple check types: The documented product includes visual checks and describes interaction and accessibility testing.
- Local feedback option: The Visual Tests addon supports on-demand local tests, while the docs position CI as still necessary.
Questions to resolve before adopting it
- Do you have useful test states? Storybook coverage is only as representative as the stories and variations your team maintains.
- Which integration matches your project? Storybook is central to the workflow, while Vitest, Playwright, and Cypress have their own documented integration paths. Confirm the current setup details for your versions and test architecture.
- What will your coverage cost? Chromatic documentation notes that snapshots count against a plan allowance, but current prices and allowances are not established here. Check Chromatic’s current pricing and plan terms before estimating cost.
- Which contexts must be tested? Decide which browsers, viewports, themes, locales, and CSS media features matter for your product rather than assuming every possible combination is covered by default.
Chromatic versus a screenshot API
Chromatic is a visual testing and review workflow built around stories or supported test-framework integrations, baselines, and CI or pull-request review. A screenshot API instead provides a way to request an image or PDF of a URL; it can be useful for capture tasks but should not be mistaken for Chromatic’s baseline-review workflow.
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If your immediate need is on-demand website capture rather than story-based regression review, ScreenshotNeo is an alternative to try first: it removes known consent banners, newsletter popups, and chat widgets before capture, and bills only clean shots. It is a different category of tool, not a direct replacement for Chromatic.
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For a one-off website capture, ScreenshotNeo returns an image or PDF from one GET request. See the ScreenshotNeo API documentation for request options.
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Frequently Asked Questions
Does Chromatic replace functional testing?
No. It adds visual review and documents interaction and accessibility checks, but functional tests still serve their own purposes.
Can Chromatic run visual tests locally?
The Storybook Visual Tests addon supports on-demand local tests; its documentation says it does not replace CI.
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Does Chromatic publish current plan prices and snapshot allowances in this review?
No. Check Chromatic’s current pricing information for the applicable plan limits and costs.
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