Performance and design: free website tools
5 free performance and design tools for web agencies and site owners improving speed, brand consistency and accessibility: CoreWebVitalsPulse, BrandDesignSystemAudit, ShopifySpeedSchemaPulse, ShopifyStorefrontXray, WooSpeedAudit. Each runs a live, read-only scan with the full result free; fix packs and monitoring are optional.
5 free, read-only checks for web agencies and site owners improving speed, brand consistency and accessibility. Run any of them on your own site; each shows a score, every check it ran and what to fix.
CoreWebVitalsPulse
A free, read-only check of the page-level causes of poor Core Web Vitals: HTML weight, render-blocking scripts, third-party script load, font loading, image sizing that causes layout shift, lazy loading and resource hints.
Free scan · fix pack $4.99, monitor from $9/mo · try the demo
BrandDesignSystemAudit
Enter a page. We read its HTML and stylesheets and measure the design system: CSS custom properties (tokens), how many distinct colors and font families are in play, font-weight sprawl, dark-mode support, favicon, app icons and SVG logo, and text/background pairs that fail WCAG contrast. The pack is a clean CSS token file built from your most-used colors and fonts.
Free scan · fix pack $4.99, monitor from $19/mo · try the demo
ShopifySpeedSchemaPulse
A free, read-only check of one store product page: page weight, render-blocking and third-party scripts, image loading, and the Product structured data Google needs for price, availability and review rich results.
Free scan · fix pack $4.99, monitor from $9/mo · try the demo
ShopifyStorefrontXray
Enter any DTC store URL. We read the public storefront: platform and theme, product count, min, median and max price, variants, and the email/SMS, reviews, loyalty, subscription, support, upsell, pixel and checkout apps it loads. The result is a storefront dossier.
Free scan · fix pack $4.99, monitor from $9/mo · try the demo
WooSpeedAudit
Enter any page of your WooCommerce store (home, category or product). We read what the page actually loads: the cart-fragments AJAX call on every page, how many plugins inject scripts and styles, render-blocking scripts in the head, jQuery Migrate, unminified plugin files, page-cache and compression headers, and lazy images. The pack has a ready functions.php snippet and a per-plugin asset list.
Free scan · fix pack $4.99, monitor from $9/mo · try the demo
Other tool groups
AI search and AI-agent readiness Technical SEO Email deliverability and domains Security, privacy and trust Conversion, signup and pricing Competitive and sales intelligence Agencies and local business sites Newsletters and podcasts
Frequently asked questions
Are these performance and design tools free?
Yes. Every scan and its full result are free. An optional fix pack (copy-paste fixes for the failing checks) and monitor plans that re-check on a schedule are paid.
Do the tools change anything on my site?
No. They are read-only: they request public pages, files and DNS records the way a browser or mail server would, and never submit forms or log in.
Which performance and design tool should I start with?
Start with CoreWebVitalsPulse; each result page links to related checks.