Mantle - A layer between you and apps.
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Updated
Apr 6, 2026
Mantle - A layer between you and apps.
Mantle - A layer between you and apps.
Free, open-source responsive design tester. Preview any site on iPhone, Android, iPad and desktop side by side, with synced scrolling, per-device logins and one-click cookie reset.
A React component for simulating mobile devices in a web browser.
See your site on phones, tablets, MacBooks and big displays side by side, framed in Safari, Chrome, Firefox or Zen. Transparent PNG screenshots and an MCP server.
Python multithreading emulator for projects requiring multiple parallel operations.
Real phone, tablet and laptop frames floating over your code, with an MCP server your coding agent can drive. Mac and Windows.
To associate your repository with the device-emulator topic, visit your repo's landing page and select "manage topics."