WCAG specialist focused on criterion-level evidence across perceivable, operable, understandable, and robust behavior, without overstating automated scan results as conformance.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Compatibility specialist focused on browser, device, viewport, operating-system, assistive-technology, and support-matrix evidence, with explicit coverage gaps rather than assumed portability.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Performance specialist focused on user-visible latency, Core Web Vitals, payload and request cost, caching, API timing, scalability, mobile constraints, memory, and leaks.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Content and UX-writing specialist focused on page identity, clear copy, information architecture, credibility, navigation, status communication, readability, and content quality.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Forms specialist focused on input contracts, validation, boundaries, state, submission, recovery, data quality, conversion barriers, and accessible interaction.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
First-impression and conversion specialist focused on value clarity, trust, navigation, calls to action, responsive composition, dead ends, and page credibility.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Checkout and payment specialist focused on order accuracy, address and payment input, trust, retry safety, pricing truth, completion, and conversion-blocking failures.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
AI
Virtual AI tester
Priya
Shopping Cart Tester
Shopping-cart specialist focused on line-item state, quantities, promotions, totals, inventory changes, persistence, accessibility, and safe transition to checkout.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
AI
Virtual AI tester
Mateo
Pricing Page Tester
Pricing and subscription specialist focused on plan clarity, comparison, currency and locale, hidden conditions, billing cadence, conversion paths, and truthful claims.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
AI-generated-code specialist focused on logic, boundaries, null and empty states, failure handling, API use, security, privacy, tests, code smells, state, and misleading AI shortcuts.
A perspective available to CARBON—not a claim that this tester has reviewed your project. Findings require execution evidence.
Inspect layout in the states your customers actually reach.
Jason Arbon CEO, testers.ai
/carbon-ui
AIMiaUsabilityAISophiaContentAIYukiLanding Pages
The initial screen looks polished. Then the user enters a long name,
opens an error message, and rotates the phone.
Now the button is off-screen and the explanation covers the
input.
/carbon-ui investigates presentation, controls,
hierarchy, consistency, and responsive states. It gives the agent a
reason to look beyond the one screenshot the feature was designed
around.
Change the content and the
state
Try empty data, dense data, a loading state, an error, and a narrow
viewport. Inspect the selected state, disabled state, and what happens
when text wraps. The goal is not to invent a new design preference; it
is to find where the current design stops communicating or working.
The agent can use screenshots, rendered geometry, source, and
interactions when those channels are available. A static image supports
visual observations. It does not establish whether a clipped control can
be reached by keyboard or whether it performs its action.
Make the report easy to act
on
/carbon-ui inspect the local account page at phone and desktop widths; test long content, validation errors, and loading states
A useful finding shows the affected element, the conditions, the
visual evidence, and the user consequence. “Looks strange” is less
actionable than “the error text covers the only recovery action at this
width.”
AI can help notice inconsistencies while the implementation is still
in context. The important step is tying the observation to a
reproducible state.
Good UI testing is not a beauty contest. It is checking whether the
interface continues to make sense when the easy screenshot stops being
the whole story.
Install CARBON at testers.ai/carbon for a supported
coding agent such as Claude, Codex, or Cursor.
