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Responsive Design Checker – Multi-Device Preview Tool
Tool Type
Previewer
Tool Domain
Developer Tool
Last Updated
July 30, 2025
Platform Type
Desktop App
Access Type
Downloadable Tool
Description
Responsive Design Checker (Responsively App) is an open-source tool that helps developers and designers test websites across multiple screen sizes simultaneously.
It speeds up responsive design workflows by allowing you to preview and interact with your site in real-time on multiple devices without switching tabs.
