PRE-SHIP DESIGN REVIEW

You built it with AI. Buyers can tell.

Point it at a URL. We render the page, score it for AI slop, measure where attention actually lands, and put it in front of four buyer profiles who say what stopped them — then hand back the Tailwind diffs.

TARGET:
⌄ Read the full terms
Turnstile pending
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Scanned benchmarks:

Slop score 0–100, lower is better. Scanned 24 Aug 2026. How these are computed

AppPreview.webm // Walkthrough

Put your landing page in front of four simulated buyers

A language model reads your page as four buyer profiles and reports what each one would object to: a staff infrastructure architect, a finance buyer, a design critic, and a visitor who gives you five seconds. Each objection points at a specific thing on the page.

These are model-generated evaluations from four buyer profiles. No real person said any of this. Nobody quoted here is a customer, and none of it is a testimonial.

EVALUATION TARGET: GENERIC V0 SAAS TEMPLATESeries B FinTech (35 engineers)

Staff infrastructure architect

Evaluates architecture proof, API clarity and data residency

REJECT (WRAPPER RISK)
SIMULATED REACTION

“I see a centered purple gradient, a generic pill button, and the phrase "all-in-one AI platform". There is literally zero architecture documentation, no mention of data residency, and no API latency benchmarks. This is 100% a weekend wrapper.”

PRIMARY SKEPTICISM TRIGGER

Zero architectural proof or data privacy guarantees.

EXACT REQUIREMENT TO WIN CONVERSION

Show me an OpenAPI schema, sub-50ms p99 latency benchmarks, and self-hosted Docker deployment instructions.

WHAT WOULD THESE FOUR PROFILES SAY ABOUT YOUR PAGE?
Run a live buyer jury simulation on any URL.

How the scan works.

Three stages, and the five scored dimensions at the end of them. The report also carries the screenshots, the attention map and the buyer jury, which are not scores and do not roll up into one.

01

The page is rendered and photographed

A headless browser loads your public URL, dismisses the banners and preloaders in the way, and captures it: a viewport and full-page screenshot, plus the geometry and computed style of every element large enough to compete for attention.

02

The measurements are scored

Fixed heuristics run over those measurements, and a salience model ranks what the eye reaches first. A language model pass writes the critique and the buyer jury on top of them.

03

The fixes are written out

You get copy-paste Tailwind diffs, headline rewrites, and prompt recipes formatted for Cursor, Claude Code and v0.

What the report scores

Each dimension returns 0–100. These are the field names you get back from the API.

FieldFlaggedStandard
visualOriginalityRadial purple and cyan blur orbsA solid ground with structural borders that carry the hierarchy
typographyDisciplineDefault unkerned Inter or Roboto at display sizesA display face with optical tracking, paired with tabular mono for data
copyOriginalitySuperlatives with nothing behind them — empower, seamless, all-in-oneConcrete mechanics: latency figures, protocols, the specific pain removed
layoutAsymmetryThree identical cards in a row, repeated down the pageAsymmetric column layouts with density where the content warrants it
brandVoiceHyper-rounded gradient pill CTAsComponents whose shape and weight match the rest of the interface

Audit localhost:3000 before you launch.

The extension reads the rendered page inside your own browser session, so it reaches what a crawler cannot: a local dev server, an unshipped branch preview, or staging sitting behind a login.

Localhost and staging
Reads client-rendered DOM and computed styles from localhost:3000, Vite dev servers and staging deployments.
In-page highlights
Underlines flagged marketing phrases on the live page and shows a concrete rewrite on hover.
Prompts for your editor
Formats the fixes for Cursor, Claude Code, Windsurf or v0.

Predictable pricing.
Zero hidden fees.

Free diagnostic scores for instant checks. Code diffs, copy surgery, and client teardowns that win redesign deals.

Have a promotional coupon?
FREE
$0/ forever

The score, the buyer jury and the attention map, so you can see whether any of this applies to you. The fixes are the paid part.

CAPABILITIES:
✓3 audits per month
✓Slop and craft score (0-100)
✓Five-dimension breakdown
✓The four-profile buyer jury
✓The visual attention map
✓Top 2 detected findings
✕The six signals behind the attention map
✕Tailwind and CSS fix snippets
✕Headline and copy rewrite matrix
✕PDF and Markdown exports
✕Developer API and CI/CD access

No card, no billing, no expiry. Stay on it as long as you like.

RECOMMENDED
AGENCY
$119/ per mo (billed yearly)

Run audits across a prospect list, export the teardown as a branded dossier, and open the redesign conversation with evidence.

CAPABILITIES:
✓Audit up to 1,000 URLs a month, so you can sweep a whole prospect list
✓Export each teardown as a branded PDF dossier under your own logo
✓Put a specific, evidenced critique in front of a client before you pitch
✓Client-ready permanent report links on your own domain
✓5 seats and shared team API access
✓Priority support channel

Billed $1,428 once a year. Cancel any time.

DEVELOPER14-DAY FREE TRIAL
$9/ per mo (billed yearly)

For one developer keeping one codebase honest. Every finding, every patch, every prompt.

CAPABILITIES:
✓The six signals behind every element on the attention map
✓Line-by-line Tailwind and CSS patches
✓Full headline and copy rewrite matrix
✓Prompt recipes for Cursor, Claude Code and v0
✓Markdown, JSON and PDF exports
✓Developer API key (100 calls/mo) and GitHub CI/CD gate
✓150 audits per month
✕Branded client dossiers
✕Multi-seat team workspace

You pay $0 today. On 15 September 2026 we charge $108 for the year, and the same amount every year after that. Cancel any time before that date in your account settings and you are never charged. Your card is verified now to start the trial.

NO SUBSCRIPTION REQUIRED / ONE-TIME FEE

Just need a one-off audit for a single website?

Unlock 1 complete report with all Tailwind code snippets, copy fixes, and an exportable link for a single domain.

FOR DEVELOPERS & CI/CD PIPELINES

Need programmatic API access or automated CI gates?

Integrate SlopCheckr into your GitHub Actions PR review workflow or call our REST API with JSON diffs. Includes API keys & webhooks.

Read API Docs ↗

Questions

The questions we get asked most often.

In two stages, and they are not equally reproducible. First, extraction: we fetch your public URL and read the document — headings, button and link labels, paragraphs, CSS class-name frequencies, declared colours and font families. Some paths additionally render the page in headless Chromium. A set of detectors then searches that document for specific CSS and utility-class signatures: the gradient function used for glow backdrops, the symmetrical three-column card grid, the fully rounded pill button, the blur behind glass panels, and a fixed dictionary of marketing clichés. The exact strings each detector matches are published at /methodology. That stage is deterministic — the same page returns the same measurements. Second, scoring: each detector that fires adds a fixed penalty, and the headline score is clamp(4, 96, floor(6 + penalty × 0.82)). A language model then writes the critique, the copy rewrites and the buyer jury; that part varies between runs. The score runs 0 (nothing detected) to 100 (everything fires). Because the detectors match strings in your markup rather than rendered pixels, a site built without those utility-class names can carry the same pattern and still score clean — that limitation and the rest are published in full at /methodology.
CUSTOM FRAMEWORK OR ENTERPRISE SITE?We support Next.js, Remix, Astro, Webflow, WordPress, and custom HTML5 builds.
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Audit your frontend before your buyers do.

Four buyer verdicts, a map of where attention actually lands, and the Tailwind diffs that fix what they caught.

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