Website testing is broader than "does it work in Chrome." A production-quality web application needs validation across multiple dimensions simultaneously, and coverage gaps in any one of them create user-facing issues that damage trust and conversion.
Functional testing: Every feature works as specified. Forms submit correctly. State changes persist. Navigation works. Error messages are accurate and helpful. This is the baseline.
Cross-browser compatibility: The feature works correctly in Chrome, Firefox, Safari, and Edge. CSS renders correctly. JavaScript APIs behave consistently. Layout does not break.
Responsive design: The layout works across mobile, tablet, and desktop viewport widths. Text is readable. Touch targets are large enough. Navigation adapts correctly to smaller screens.
Accessibility: The application is usable by keyboard-only users. Screen readers can navigate it meaningfully. Color contrast meets WCAG 2.1 AA. Focus management is logical.
Performance: Pages load within acceptable thresholds. Core Web Vitals are within passing ranges. Large media files don't block the critical rendering path.
SEO smoke tests: Meta titles and descriptions are present and populated. Canonical tags are correct. Structured data is valid. No obvious crawlability issues.
95%
Release Coverage Achieved
45%
Avg. Reduction in Escaped Defects
18+
Years Combined QA Experience
Cross-Browser Testing Strategy
Not every browser requires the same depth of testing. The right cross-browser strategy is based on your actual user data, not a theoretical list of every browser ever made.
For most web applications, the meaningful target is Chrome (including Android Chrome), Safari (including iOS Safari), Firefox, and Edge. Together these cover 95%+ of most application's traffic. We configure test runs against all four, with automated checks for the most common rendering differences.
BrowserStack vs real devices: BrowserStack covers most cross-browser testing needs without maintaining a physical device lab. Real devices are valuable for confirming specific touch interactions, camera and microphone access, and push notification behavior that emulators don't fully replicate. We use both depending on what's being tested.
Viewport breakpoints: We test at 375px (iPhone SE), 414px (iPhone Pro Max), 768px (iPad), 1024px (small laptop), and 1440px (standard desktop). Any layout built with responsive CSS should be verified at each breakpoint before release.
Safari on iOS is the browser that catches teams off guard most often. Chromium-based testing catches most issues, but Safari's WebKit engine handles CSS, JavaScript APIs, and form elements differently enough that dedicated Safari testing is not optional for any application with meaningful iOS traffic.
Accessibility Testing Every Web App Should Do
Accessibility testing is not just a compliance checkbox. Accessible web applications are also more usable for everyone – better keyboard navigation, clearer error messages, more logical information architecture. The time invested in accessibility testing pays off in user experience quality across the board.
The baseline we check on every web application:
Keyboard navigation: Every interactive element is reachable by Tab key. Focus indicators are visible. Modal dialogs trap focus correctly. Keyboard users can complete every critical flow.
Screen reader compatibility: We test with NVDA on Windows and VoiceOver on Mac/iOS. Images have meaningful alt text. Form labels are associated with inputs. Dynamic content updates are announced.
Color contrast: Text meets WCAG 2.1 AA contrast ratios – 4.5:1 for normal text, 3:1 for large text. We use automated tools to flag violations and manual review to confirm.
ARIA usage: ARIA attributes are present where needed and not overused where they create noise. Common mistakes – aria-label on elements that already have text content, role assignments that override semantic HTML – are caught and flagged.
Combining Manual and Automated Website Testing
The most effective website testing combines automated checks for speed and consistency with manual testing for the judgment calls that automation cannot make.
Automated tests are good at: verifying that forms submit correctly across browsers, checking that pages render at multiple viewports without obvious layout breaks, running accessibility audits that catch the most common violations, and running these checks on every deploy without human time.
Manual testing is good at: evaluating whether the UX actually makes sense to a first-time user, catching visual issues that a pixel comparison would miss, testing keyboard navigation in a way that reflects real user behavior, and finding the unexpected interactions between features that no script would think to test.
We build both layers – automated cross-browser suites with Playwright, and exploratory manual testing sessions for each significant release.
Ready for website testing that covers all the angles?
We scope website testing engagements based on your application and release cadence. A discovery call is the right first step.
We test against the browsers that your analytics show your users actually use. For most web applications, that means Chrome, Firefox, Safari, and Edge. We configure Playwright or BrowserStack to cover these systematically, with additional spot-testing on mobile browsers.
Do you test on mobile devices?
Yes. We test responsive behavior using browser DevTools and emulation for layout validation, and real device testing via BrowserStack for critical user flows. For native mobile apps, see our mobile app testing service.
What is accessibility testing?
Accessibility testing checks whether your web application is usable by people with disabilities. At a minimum, we test keyboard navigation, screen reader compatibility, color contrast ratios, focus management, and ARIA attribute usage against WCAG 2.1 AA as a baseline.
How do you test responsive design?
We test at standard breakpoints – mobile (375px), tablet (768px), and desktop (1280px+) – plus common device sizes. We check layout integrity, text readability, touch target sizes, navigation behavior, and that no content is clipped or hidden unintentionally.
Can you test single-page applications (SPAs)?
Yes. SPAs have specific testing considerations – route changes, lazy loading, state management, and client-side navigation – that we address directly. Playwright handles SPA testing well, including waiting for network requests and DOM updates after navigation.