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Choose Responsive Device
Select Responsive Device as your capture mode. Capture remembers your preferred mode until you change it.
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Screenshot Q&A →
Responsive website screenshot tool
Take responsive website screenshots at real viewport widths.
Take responsive website screenshots in Chrome at desktop, laptop, tablet, mobile or custom viewport sizes. Capture changes the page viewport before taking the screenshot, so your website's actual responsive CSS can react instead of simply stretching or shrinking an image.
DesktopLaptopTabletMobileCustom viewportLocal-first editing
How responsive capture works
Change the viewport first. Capture second.
Responsive screenshots should reflect the website layout at the selected width. Capture temporarily opens the source page at the requested viewport, waits for the responsive layout, then uses the existing capture pipeline.
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Select a real viewport size
Choose a phone, tablet, laptop or desktop preset. Pro users can enter custom dimensions. Preset width is exact; Chrome may shorten height to fit the display, and Capture records the actual viewport.
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Let the website reflow
The page is rendered at the requested viewport so CSS media queries and responsive layout rules can respond before capture.
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Capture the full page at that width
Responsive mode uses the full-page capture pipeline after the page reflows. Crop the result if you need a smaller section.
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Annotate, compare and report
Document broken layouts, spacing issues and responsive bugs using annotations, before/after comparisons and review reports.
Viewport presets
Review the layouts your visitors actually see.
Current responsive tools commonly organize testing around mobile, tablet, laptop and desktop widths. Capture adds those same practical viewport categories directly to the screenshot workflow, with a custom-size option for exact breakpoint testing.
Capture narrow responsive layouts such as 390 × 844 and review stacked navigation, cards, forms and CTAs.
Check intermediate layouts where desktop grids often collapse and spacing or navigation can behave differently.
Review common smaller-desktop widths without relying only on a large external monitor.
Capture wide layouts or enter exact viewport dimensions when you need to reproduce a specific responsive breakpoint.
Responsive design review
Find layout problems before your users do.
A website can look perfect at one width and still break at another. Responsive screenshots create a visual record that makes those differences easier to review, explain and fix.
Navigation & menus
Check when desktop navigation collapses, whether mobile menus fit properly, and whether fixed headers cover content.
Cards & grids
Review column changes, card wrapping, inconsistent heights and unexpected gaps around breakpoint transitions.
Text & readability
Spot oversized headings, awkward line breaks, clipped labels and content that becomes difficult to scan on smaller screens.
Buttons & forms
Verify CTAs remain visible, tap targets are clear, forms fit the viewport and controls do not overlap.
QA bug reports
Capture the exact viewport that reproduces a responsive bug and mark the issue directly on the screenshot.
Client approvals
Show desktop, tablet and mobile states clearly during website review without asking a client to resize their own browser.
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Your responsive screenshots stay on your computer.
Normal responsive capture, full-page stitching, annotation, comparison and local editing are designed to happen on your device. Your screenshot image does not need to be uploaded to RATdeck just to test or review responsive layouts. Account and subscription information is handled separately.
More than a responsive preview
Capture the responsive layout and finish the review in one workflow.
Many responsive tools focus only on previewing screen sizes. Capture connects viewport testing with full-page screenshots, annotation, privacy, comparison and professional reporting.
| Responsive workflow | Capture | Why it matters |
|---|---|---|
| Desktop, laptop, tablet & mobile presets | Included | Quickly reproduce common responsive widths. |
| Actual responsive CSS breakpoints | Included | The page reflows before capture instead of resizing a finished screenshot. |
| Full-page capture at responsive width | Included | Review the entire mobile or tablet page, not just one viewport. |
| Annotation & privacy tools | Included | Mark responsive bugs and protect sensitive details. |
| Custom viewport | Pro | Reproduce an exact breakpoint or customer screen size. |
| Before / After & visual difference | Pro | Compare responsive fixes and highlight changed regions. |
| Review Reports & PDF | Pro | Turn responsive findings into a structured deliverable. |
Mobile website screenshots
Test the mobile layout from desktop Chrome without pretending the screenshot was simply resized.
Responsive viewport, not image scaling
Scaling down a desktop screenshot does not show what a responsive website does at a mobile breakpoint. Navigation, columns, typography, image positions and controls may all change when the viewport becomes narrower.
Capture's responsive workflow changes the page viewport before the screenshot is taken so CSS media queries can respond to the selected width.
Important limitation
This is responsive viewport testing in desktop Chrome. It does not claim to reproduce every hardware, browser-engine, touch, operating-system or mobile user-agent behavior of a physical phone.
For visual responsive QA and screenshot documentation, viewport-based capture is fast and useful. For device-specific interaction bugs, final testing on the real target device is still appropriate.
Responsive screenshot FAQ
Questions about capturing websites at different screen sizes.
Can I take a mobile website screenshot from desktop Chrome?+
Yes. Choose Responsive Device and select the Mobile preset. Capture opens the page at that viewport width before taking the screenshot so the responsive layout can render.
Does Capture emulate a real iPhone or Android phone?+
Capture reproduces responsive viewport dimensions in desktop Chrome. It is designed for visual responsive testing and screenshots, not full hardware, browser-engine, touch or mobile user-agent emulation.
Can I capture an entire mobile webpage, not just the visible part?+
Yes. Responsive capture can work with the full-page capture pipeline so the website can be captured beyond the visible viewport at the chosen responsive width.
Can I use a custom viewport width?+
Yes. Custom viewport dimensions are part of the Pro responsive workflow for reproducing exact breakpoints or client device dimensions.
Will responsive screenshots be uploaded somewhere?+
Normal capture, stitching and editing are designed to happen locally on your computer. Screenshot image content does not need to be uploaded to RATdeck for these workflows. Account and subscription communication is separate.
Can I compare a responsive screenshot before and after a fix?+
Yes, with Pro. Retake the same page using matching capture mode, viewport and display scale. Compatible pairs can use Reveal Slider or Side by Side; Pixel Differences additionally needs a reliable same-page alignment.
Why does the actual height differ from a phone preset?+
Chrome may shorten a phone or tablet popup to fit the available display. The preset width remains exact, and Capture records target and actual viewport dimensions. Custom dimensions in Pro must fit exactly or show an error.
Does a responsive screenshot prove a page works on a real phone?+
No. It shows a desktop Chrome rendering at a chosen viewport. Device-specific touch, fonts, browser-engine behavior, keyboard layout and operating-system behavior still need testing on the target device.
Which viewport information should I include in a bug report?+
Record the actual width and height, browser version, zoom or display scale, page state and the steps to reproduce the issue. A label such as “mobile” alone is not enough to reproduce a breakpoint problem.
Capture by RATdeck
See the breakpoint.
Capture the evidence.
Responsive website screenshots with annotation and local-first editing in one Chrome workflow.
Responsive & Visual Testing