Knowledge base — Definition
Quality Assurance (QA)
Website quality assurance explained: functional, cross-browser, responsive, performance and accessibility testing for Toronto business websites.
What Is Quality Assurance in Web Development?
Quality assurance (QA) in web development is the systematic process of ensuring your website meets quality standards before and after launch. QA testing catches bugs, verifies functionality, validates accessibility compliance, and confirms that your Toronto business website delivers a flawless experience across all devices and browsers.
Launching without proper QA risks broken features, poor user experiences, and lost revenue. For Toronto businesses, a buggy website damages credibility and drives potential customers to competitors. QA testing protects your investment and reputation.
Types of QA Testing
Functional Testing
Functional testing verifies that every feature works as intended: contact forms submit correctly, navigation links point to the right pages, shopping carts calculate totals accurately, and search functions return relevant results. Test every interactive element on your site — buttons, forms, dropdowns, and filters should all work perfectly before launch.
Cross-Browser Testing
Your website must work consistently across all major browsers: Chrome, Safari, Firefox, and Edge. Each browser renders code slightly differently, and what works perfectly in Chrome may break in Safari. Test on real devices and browsers, not just emulators, to catch browser-specific issues that affect real users.
Responsive Testing
With over 60% of traffic from mobile devices, responsive testing ensures your site adapts properly to every screen size. Test on phones, tablets, and desktops at various resolutions. Check that text is readable, buttons are tappable, images resize correctly, and no horizontal scrolling occurs on mobile devices.
Performance Testing
Performance QA measures page load times, server response times, and resource usage under various conditions. Use Google Lighthouse and PageSpeed Insights to benchmark performance. Test with slow network connections to ensure your site remains usable for all visitors, not just those with fast connections.
Accessibility Testing
Accessibility QA verifies compliance with WCAG standards, ensuring your website is usable by people with disabilities. Test with screen readers, verify keyboard navigation works, check colour contrast ratios, and validate form labels and error messages. In Ontario, AODA compliance is legally required for businesses with 50+ employees.
QA Testing Checklist for Toronto Businesses
- Test all forms — submit, validate, and confirm delivery
- Check every link — no 404 errors or broken redirects
- Verify mobile layout on iPhone and Android devices
- Test in Chrome, Safari, Firefox, and Edge
- Run Lighthouse audit — target 90+ scores
- Validate HTML and CSS for errors
- Test payment processing end-to-end
- Verify SSL certificate and HTTPS enforcement
- Check page load times under 3 seconds
- Test with screen reader for accessibility
Frequently Asked Questions
When should QA testing happen?
QA testing should happen throughout development and before every launch or major update. The most critical QA pass happens right before going live, but ongoing testing after updates, plugin changes, or content additions catches regressions that might otherwise go unnoticed.
What tools are used for QA testing?
Popular QA tools include Google Lighthouse for performance and accessibility, WAVE for accessibility compliance, BrowserStack for cross-browser testing, Lighthouse CI for automated monitoring, and Screaming Frog for crawling and finding broken links. Many are free or have free tiers.
How much does QA testing cost?
Basic QA testing can be done for free using tools like Lighthouse and WAVE. Professional QA testing for a business website typically costs $500-2,000 depending on site complexity. The cost of not testing — lost customers, damaged reputation, emergency fixes — far exceeds the investment in proper QA.
Related Resources
Further reading: Testing — MDN Web Docs.