Responsive Breakpoint Tester

What it does

A free browser-based tool that lets developers test responsive layouts across multiple viewport sizes simultaneously. Speed up breakpoint debugging and improve layout accuracy without switching devices.

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  Test your website on 180+ device viewports (with multi-device mode)2024 · viewport-tester.com · ▲74

  Hey HN! We do a lot of frontend testing, and one thing we find frustrating is the limited tooling available to observe how a URL renders on different viewports/devices simultaneously. For example, we can use Chrome Inspector's "Device" previews, but we run into the following: - Chrome doesn't keep those devices/viewports up to date, and adding new ones is pretty annoying (we've open sourced our collection of 180+ viewports/dimensions under MIT). - You can’t see multiple viewports at once (and it’s cumbersome switching back and forth) - When you notice a problem, there's no…

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  Responsive Viewer2019 · chromewebstore.google.com · ▲393

  View multiple screen dimensions in one view

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  Multi Screen Test2015 · ▲216

  Test your site at different screen resolutions & devices.

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  Responsive Image Breakpoint Generator2016 · responsivebreakpoints.com · ▲186

  Turn one image into the ideal set of per-device images

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  Responsive View2016 · responsiv.eu · ▲216

  Test your responsive design across different devices

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  Responsive Design Checker2018 · ▲173

  Check how responsive is your website across device sizes

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