Free Web & UX Tools
Responsive Breakpoint Preview
Load a public page into adjustable mobile, tablet, laptop, and desktop viewport frames.
What this tool does
Inspect a public page inside controlled viewport widths.
The preview loads a user-supplied public URL directly in a sandboxed iframe and changes the frame width across common mobile, tablet, laptop, and desktop presets.
Some sites block iframe embedding with security headers. The tool is a fast inspection aid, not a replacement for browser developer tools and real-device testing.
Use the tool
Preview responsive breakpoints
Enter a public URL, load it directly in the frame, and switch between common viewport widths.
Some sites block iframe previews using security headers. Loading a URL connects your browser directly to that site; Draftroom does not proxy it.
Load a public page to inspect this viewport.
The frame changes width; use real devices and browser developer tools for final QA.
How to use it
Three quick steps
- 1Enter a complete HTTP or HTTPS page URL.
- 2Switch through mobile, tablet, laptop, and desktop widths.
- 3Use browser developer tools and real devices for final interaction, accessibility, and performance QA.
Worked example
Inspect a landing page at 375 pixels
Load the deployed page and select the mobile preset.
FAQ
Questions about the responsive breakpoint preview
Practical details about using the tool and understanding its result.
Keep working
Related tools
Open Graph Preview
Preview a social share card and copy the Open Graph meta tags behind it.
Open toolFavicon Generator
Turn a local image into five transparent PNG icon sizes and matching HTML tags.
Open toolGrid Calculator
Calculate precise column widths from a canvas, margins, gutters, and column count.
Open toolFrom one asset to the whole workflow
Keep responsive findings connected to the implementation and review thread.
Draftroom keeps projects, creative files, feedback, revisions, and approvals connected in one workspace.