Report what you've checked
Enter overflow-risk elements, undersized tap targets, unscaled media, and which viewport buckets you've actually reviewed.
VIEWPORT FAILURE AUDIT
Viewport Test
Evaluates MVP screens across common viewport buckets to identify layout-failure risk before you build.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Get a failure-risk score
Viewport Test weighs each risk factor and how much viewport coverage you've verified so far.
Close the gaps
Fix flagged elements and check the remaining viewport buckets, then re-run the score.
Continue learning: Who should approve MVP requirements?
Frequently asked questions
Does this actually render my screens at different widths?
No — there's no rendering engine here. It's a self-reported checklist that scores failure risk based on your answers, not automated screenshot testing.
How is this different from Break Point AI?
Break Point AI recommends where your breakpoints should sit. Viewport Test scores the risk of layout failures within the buckets you already have, regardless of exact breakpoint placement.
What are the four viewport buckets?
Mobile (~375-428px), tablet (~600-834px), laptop (~1024-1440px), and wide desktop (~1600px+) — the ranges most MVPs need to hold up at.
How We Compare
| Feature | MVPHub | Chrome DevTools device toolbar | BrowserStack |
|---|---|---|---|
| Structured risk scoring from a checklist | Included | Not included | Not included |
| No setup or account required | Included | Included | Not included |
| Actual rendered screenshots | Not included | Included | Included |
| Free | Included | Included | Not included |
DevTools and BrowserStack show real rendering at real widths. Viewport Test is a faster, structural pre-check to catch obvious risk factors before or alongside that manual testing.
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