Responsive Preview
Website responsive preview testing.
Preview opens in a sandboxed iframe. Sites that disallow embedding cannot be displayed.
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What this tool does
Embed a supplied site in a sandboxed frame at a chosen viewport size. Frame policies may prevent display and this is not a full device emulator.
How to use it
- Set url.
- Set width (initial value: 390).
- Set height (initial value: 844).
- Choose Process, inspect the result, then use the download control. A reported error means no successful output was produced.
Limits and result checks
Preview opens in a sandboxed iframe. Sites that disallow embedding cannot be displayed.
Common questions
Why is the preview blank for some websites?
The destination can prohibit iframe embedding through its response headers. The sandbox also prevents scripts and other active behavior. A blank frame does not prove the site itself is broken.
Where can I read the data-handling details for Responsive Preview?
Inputs are processed in browser memory and are not uploaded by this plugin. Generated downloads remain on your device. The site privacy policy explains memory cleanup and hosting logs.