How can we help you?
Find step-by-step solutions for testing local files, troubleshooting responsive media queries, and configuring keyboard shortcuts.
Local Testing
Configure Chrome permissions to test local files (file:/// protocol) directly in the simulator.
Media Queries & CSS
Fix issues where desktop layout displays on mobile or media queries do not trigger.
Incognito & Privacy
Enable private browsing mode testing and custom browser keyboard hotkeys.
All Support Guides
How to Test Local Files (file:/// URLs) in Responsive Viewer
Step-by-step guide to enabling Chrome file URL permissions so you can test local HTML, CSS, and JS files directly in the simulator.
Why Are CSS Media Queries Not Working in Responsive Viewer?
Fix common viewport issues where your website desktop layout is rendered instead of responsive mobile styles.
How to Configure Keyboard Shortcuts for Responsive Viewer
Set custom hotkeys (e.g. Ctrl+Shift+M or Cmd+Shift+M) to toggle Responsive Viewer on and off in one keypress.
How to Enable Responsive Viewer in Incognito Windows
Test your responsive pages in private browsing mode with fresh cache and zero cookie interference.
How to Show or Hide Scrollbars in Simulator Mode
Configure scrollbar behavior in Responsive Viewer to emulate native iOS/Android overlay scrollbars or desktop scrollbars.
Features & Pro Edition Status
Information on device availability, Pro features, and unlocked status in this edition of Responsive Viewer.
Still have questions or found a bug?
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