Responsively
Open SourceTest responsive design on all devices simultaneously
AI Summary
Responsively is an open-source desktop tool that enables developers to test websites simultaneously across multiple device resolutions. It simulates various screen sizes, device types, and orientations in a single view. The tool significantly accelerates the responsive design workflow and saves time in cross-device testing.
✓ Pros
- + Free and open-source, no hidden costs
- + Test all devices synchronously, real browser developer tools integrated
- + Cross-platform availability, easy installation and use
✗ Cons
- − Simulates devices, does not test on real physical devices
- − Limited network simulation and performance testing features
Use Cases
- → Simultaneous testing of websites on desktop, tablet, and mobile
- → Verification of CSS media queries and responsive layouts
- → Performance testing and debugging across different screen sizes
- → Design validation before deployment to production
Who is it for?
Frontend developers and web designers who want to efficiently test and optimize responsive design.
Tags
What is Responsively?
Responsively is a free, cross-platform desktop tool that displays web pages simultaneously across multiple device resolutions. Instead of switching browser tabs manually or toggling the DevTools device simulation repeatedly, you see desktop, tablet and mobile side by side in a single view. All device views are synchronized: scrolling in one scrolls all of them. This saves noticeable time in day-to-day development, especially when iterating over CSS media queries.
The project is open source and actively maintained on GitHub. Installation is straightforward, and no prior knowledge of Docker or similar environments is required.
Core features
- Simultaneous preview across multiple screen sizes in one window, with synchronized scrolling and clicking
- Simulates various device types and orientations (portrait, landscape)
- Built-in browser developer tools for direct debugging within the same workflow
- Inspection of responsive layouts and CSS media queries without switching browsers
- Design validation directly before deployment
Who is Responsively for?
The tool is aimed at frontend developers and web designers who want to test responsive design and catch layout issues early. Those who regularly build layouts across multiple breakpoints benefit most, because the manual switching between device views is eliminated.
Limitations appear when real device behavior is required. Responsively simulates resolutions but does not run on physical devices. The tool does not offer network throttling or detailed performance profiling.
Context & alternatives
Responsively belongs to the category of browser-based development tools for responsive design. The closest points of comparison are the built-in device simulators in Chrome DevTools and Firefox, which only ever show one resolution at a time. For teams that need deep performance testing or real device stacks, cloud services such as BrowserStack are the more suitable choice.
Responsively fills the space in between: free, local, no account required. For anyone iterating quickly and checking visual consistency across breakpoints, it delivers results faster than switching between DevTools tabs.
