Free AI UX roast

Roast my UI.

Instant, structured feedback on your interface. An AI agent roasts your UI against named usability laws for hierarchy, contrast, states, and spacing, and shows the screenshot behind every call.

https://

Roast your own site or a competitor’s · no login, no card required · takes about 2 minutes

"Roast my UI" posts usually get you a handful of contradictory opinions and an argument about a button radius. What you actually want is a structured pass against the rules real interfaces are judged by: visual hierarchy, contrast, feedback on interaction, consistency. With receipts to back each note.

ClapBack looks at your live interface and roasts it against those named laws, not personal taste. It flags the CTA that doesn't stand out, the states you forgot (hover, focus, empty, error), the contrast that fails, and the spacing that reads as noise. Each note carries the screenshot and the rule, so the feedback is checkable instead of a matter of opinion.

What the roast looks for in a UI

Von Restorff Effect · Laws of UX

Visual hierarchy

Is the primary action unmistakably primary? When everything shouts, nothing does. The roast flags interfaces where the most important element doesn't win the eye.

WCAG 2.2 · 1.4.3 Contrast

Contrast & legibility

It checks real contrast ratios, not vibes. It catches the light-gray text and tinted buttons that look refined in Figma and fail on a real screen.

Nielsen · Consistency & standards

Consistency

Three button styles, four shades of the same gray, inconsistent spacing. That drift makes a UI feel amateur even when each screen looks fine on its own.

Nielsen · Visibility of system status

Interaction states

Hover, focus, active, loading, disabled, empty, error: the states that get skipped. Missing focus states in particular are both an accessibility failure and a keyboard-user trap.

Law of Proximity · Laws of UX

Spacing & grouping

Related things should sit together and unrelated things apart. Cramped or arbitrary spacing makes users work to parse the layout.

Miller's Law · Laws of UX

Density & cognitive load

Too many choices, too much on screen at once. It flags the interfaces that overwhelm before they orient.

Questions

Can it review a Figma file or just a live URL?

It reviews a live URL: a deployed app, a prototype, or a staging link. It evaluates real rendered contrast and interaction states, which a static Figma frame can't fully show. A public prototype URL works.

Is the feedback just opinion?

No. Every note maps to a named rule (a Nielsen heuristic, a WCAG criterion, or a Law of UX) and comes with the screenshot, so you can check it rather than take our word for it.

Will it help with accessibility?

Partly. It catches machine-checkable and visible issues like contrast failures and missing focus states, which are common and costly. A full accessibility audit with a screen-reader user goes further than any automated pass.

How fast is it?

The free mini roast returns in a minute or two. It's built for the moment before you ship, not a two-week engagement.

Ready for the receipts?

https://

Roast your own site or a competitor’s · no login, no card required · takes about 2 minutes