Instantly check your screen resolution, viewport and DPR. Plus PPI & aspect-ratio calculators, breakpoint references and
| Founded year: | 2026 |
| Country: | China |
| Funding rounds: | Not set |
| Total funding amount: | Not set |
Description
ScreenSize.net is a free toolkit for front-end developers, designers and QA engineers who need exact display numbers fast. It detects your screen resolution, viewport size and device pixel ratio live in the browser, and adds PPI and aspect-ratio calculators, Tailwind/Bootstrap breakpoint references and spec charts for popular phones, tablets and laptops. Everything runs client-side with no sign-up, so it's safe to open on any device or share in a bug report.Have a startup you want to promote?
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