Check the screen at each key width
Each of your defined viewport widths gets its own check, since a bug at 768px is invisible if you only ever test at 375px and 1440px.
Free MVP QA tool
ResponsiveQA
Check an implemented interface at each of your key viewport widths and log clipping, overflow, overlap, or alignment problems before they reach real users.
- Calculated instantly from your inputs
- No signup or data submission
- A focused next step for MVP planning
Your entries remain in this browser session and are not sent to MVPHub.
Your inputs
Check a screen across viewport widths
Enter one viewport check per line as Viewport width | issue found (none/clipping/overflow/overlap/alignment) | notes. Check the same screen at each width you support.
Your calculated result
Your result
0/100
Planning score
Recommended next actions
How it works
Classify the issue type
Any problem found is classified as clipping, overflow, overlap, or alignment — the four most common responsive-layout failure modes.
Flag the widths needing fixes
The report lists exactly which viewport widths have problems and what kind, so fixes can target the specific breakpoint rather than guessing.
Frequently asked questions
Does ResponsiveQA automatically render my page at each width?
No — you check the page yourself in your browser or dev tools at each width and log what you observe. This structures and summarizes the results.
How many viewport widths should I check?
At minimum your smallest supported mobile width, a common tablet width, and your primary desktop width — more widths give more confidence but take more time.
What if the same issue appears at multiple widths?
Log it once per width — the report will show it as a recurring issue across widths, which is a stronger signal something structural needs fixing.
Is this the same as BreakPoint AI?
BreakPoint AI recommends where your breakpoints should be during design; ResponsiveQA checks an already-implemented screen against widths you choose to verify.
How we compare
| Capability | MVPHub | Manually resizing the browser window | BrowserStack or a device lab |
|---|---|---|---|
| Structured issue classification per width | ✓ | × | — |
| Summarizes which widths and issue types recur | ✓ | × | × |
| Real device rendering and testing | × | — | ✓ |
| No account, paste and get a report instantly | ✓ | ✓ | × |
MVPHub structures the results of a manual resize-and-check pass into a clear summary. BrowserStack and a real device lab test on actual hardware, which this tool does not replace.