The Website Performance Checklist Before You Launch

Speed affects everything from search rankings to conversion. These are the checks we run on every website before it goes live.

Performance

• Images are served in modern formats (WebP/AVIF), correctly sized and lazy-loaded below the fold.
• Fonts are self-hosted or optimised, with fallback metrics to avoid layout shift.
• Third-party scripts are audited — every tag must justify its cost.
• Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift are tested on a mid-range phone.

SEO foundations

• Unique titles and meta descriptions on every page.
• Canonical URLs, XML sitemap and robots.txt in place.
• Structured data for the organisation, services, articles and breadcrumbs.
• Redirects mapped from any old URLs.

Accessibility & quality

• Keyboard navigation works for menus, forms and dialogs.
• Colour contrast meets WCAG AA.
• Forms have labels, clear errors and success states.
• No console errors, broken links or horizontal scrolling on mobile.