Mobile Phone Emulator is a Firefox extension that simulates mobile phones and tablets for website testing. It provides device presets, orientation switching, viewport simulation, user-agent spoofing, and touch interaction emulation for developers and designers.
In the Browser DevTools & extensions space, Mobile phone emulator takes a focused approach. It focuses on testing how websites render and behave on different mobile devices without using physical phones. It is built as a B2B product for web developers and designers. It is available for free. It runs on the web, embeddable surfaces, and Android.
Hizone builds and maintains Mobile phone emulator, and it first shipped in 2026. Key capabilities include device library, orientation switching, and viewport simulation. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
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