Four kinds of results

Not every number on your report means the same thing:

  • Rule-based HTML checks — deterministic code that reads your HTML and CSS. Same page, same answer, every time. These are the ones Lensux publishes an accuracy figure for.
  • Core Web Vitals — measured by Google itself (real Chrome users plus a lab test). Lensux reports Google's numbers as they come.
  • Rendered checks — a real browser draws the page to measure contrast, tap-target size, keyboard order, an axe-core WCAG 2.2 scan, and a predicted attention map. The attention map is a model, always labelled "predicted", never eye-tracking.
  • AI audits — an AI model's expert-style opinion (design psychology, trends, visitor simulation). Useful for ideas and a second opinion, but not deterministic.

The 66 checks

The full audit runs 66 checks across UX laws and Nielsen heuristics, colour and contrast, accessibility, typography, layout and structure, speed/images/media, structured data, breadcrumbs, dead-end links and information architecture — plus the ecommerce and SaaS guideline libraries.

The free scan runs 24 of them on the page's HTML; the full audit adds the real-browser checks, Core Web Vitals and the AI reviews.

Every finding names the element and the fix

Each issue shows the exact CSS selector of the element, the rule it breaks, its severity and — when the fix is mechanical — the corrected HTML or CSS you can paste in. No vague "improve your contrast": you get the element and the value.

Scores and severity

Each check is scored out of 100. Findings are ranked by severity (high, needs attention, on target) so you can fix the high-impact ones first. A category score rolls up its checks, and the site's overall score rolls up the categories.

Multi-page audits and designs

Add the inner pages of a site and audit them all; Lensux suggests them from your sitemap. You can also upload a mockup from Figma or any tool to get the AI reviews and a predicted heatmap before a line of code ships.

Competitor comparison and benchmark

Scan up to 3 competitors with the same 24 checks, side by side, and see how you rank against every site scanned with Lensux and against your sector's average. Numbers only show once there are enough sites in a sector to be meaningful.

Frequently asked questions

Why is the attention map not eye-tracking?

It's a visual-saliency model: it weighs each element's size, contrast, type and position and simulates where the eye lands first, with the centre/top-left bias that web eye-tracking studies report. It's a prediction, labelled as such — not a recording of real eyes.

Does Lensux work with JavaScript-heavy sites?

Yes. Sites that build their content with JavaScript are audited in a real browser in the full audit; the instant scan tells you when that applies.