Screenshot testing that actually ships.
UIProof captures your UI at every viewport before and after every deploy, diffs pixels automatically, and uses AI to classify what broke — so you only fix real regressions.
Why screenshot testing is non-negotiable in 2025
Visual regressions ship faster than any team can review manually.
How screenshot testing works with UIProof
Five steps from zero to automated visual regression coverage — no test framework required.
Add your URLs
Paste the routes you want to monitor. UIProof handles everything — real Chromium browser, full-page rendering, JavaScript execution. No Playwright scripts, no selectors, no test boilerplate.
Capture your baseline
UIProof takes your first set of screenshots across desktop (1440px), tablet (768px), and mobile (375px). This is your visual reference — the proof that your UI looked right before the next change.
Deploy a change
Ship a feature, merge a PR, or trigger a deploy. Then kick off a new capture via the dashboard or the REST API in your CI/CD pipeline.
Pixel-level diff + AI classification
UIProof overlays before and after screenshots pixel-by-pixel. The AI layer classifies every difference: cosmetic update, intentional redesign, or regression — with a severity score and plain-English explanation.
Act on real regressions only
Get alerted only when something actually broke. Email and webhook notifications fire on confirmed regressions. Intentional UI changes are acknowledged, not escalated.
Everything screenshot testing needs to actually work
Pixel diffs, AI classification, multi-viewport coverage, and CI/CD hooks — all in one tool.
Every deploy is a screenshot test. No extra work required.
Trigger UIProof from your Vercel deploy hook, GitHub Action, or any CI pipeline. One API call captures all your routes at all viewports, diffs against your baseline, and delivers results before your next PR is merged.
# GitHub Action: screenshot test on every deploy
- name: UIProof screenshot test
run: |
curl -X POST https://uiproof.com/api/v1/capture \
-H "Authorization: Bearer ${{ secrets.UIPROOF_API_KEY }}" \
-d '{"site_id": "${{ vars.UIPROOF_SITE_ID }}"}'
Frequently asked questions
What is screenshot testing?
Screenshot testing (also called visual snapshot testing or visual regression testing) is the practice of automatically capturing screenshots of your UI, then comparing them before and after code changes. When pixels differ unexpectedly, the test fails — flagging a potential visual regression. It complements functional testing by verifying what your users actually see, not just what your code does.
How is UIProof different from Playwright or Chromatic?
Playwright screenshot testing is code-first: you write test scripts, maintain selectors, and run tests in CI. Chromatic is component-first: it integrates with Storybook to test components in isolation. UIProof is URL-first: you enter live routes, UIProof captures and diffs them automatically with no test code or Storybook required. It works against any live site, any framework, and adds AI classification on top of the raw pixel diff.
What viewports does UIProof test?
UIProof captures screenshots at three viewport widths on every run: desktop (1440px), tablet (768px), and mobile (375px). Every route is tested at all three viewports automatically — so a responsive regression on mobile surfaces even if the desktop view looks fine.
Can I trigger screenshot testing from my CI/CD pipeline?
Yes. UIProof provides a REST API — POST to the capture endpoint after your deploy completes. Works with GitHub Actions, Vercel deploy hooks, Netlify, CircleCI, and any pipeline that can make an HTTP request. Results are delivered via email or webhook so your pipeline can react to regressions.
How does the AI decide if a screenshot diff is a regression?
UIProof's AI model analyzes the before and after screenshots, the pixel diff overlay, and the change context. A navigation menu disappearing on mobile gets a different classification than a button color update. Each diff gets a label (cosmetic, intentional, or regression), a severity score, and an explanation you can act on — not just a raw pixel count.
Does screenshot testing work with Next.js, React, and modern frameworks?
UIProof is framework-agnostic. It captures screenshots of live rendered URLs in a real Chromium browser — so Next.js, Nuxt, Remix, Astro, SvelteKit, React, Vue, Svelte, or plain HTML all work the same way. Client-side rendering, server-side rendering, and static sites are all supported.
Start screenshot testing in minutes — no test code required.
Free plan. No credit card. Add your URLs and UIProof captures, diffs, and classifies every visual change across every viewport, automatically.
Start free — no credit card