Active (MV3)Developer Tool

Best User-Agent Switcher Alternatives for Chrome MV3

Quick Answer

User-Agent Switcher is available as an MV3 extension in the Chrome Web Store. Chrome DevTools includes built-in device emulation for user-agent testing without an extension.

What Happened

  • User-Agent Switcher was updated to support Manifest V3.
  • Similar tools like Requestly offer broader developer capabilities.
  • Chrome DevTools also supports user agent emulation natively.

Best Alternatives to User-Agent Switcher

AlternativeBest ForStatusLinks
Requestly
Advanced API mocking and debugging · User-agent switching capability
Users wanting comprehensive API testing and mocking capabilitiesActive (MV3)
Chrome DevTools
Built into Chrome, no extension needed · Device mode emulation
Users preferring built-in browser developer toolsActive (MV3)

Migration Steps

No migration needed if User-Agent Switcher is working for you.

Explore Chrome DevTools built-in device emulation as an alternative.

Requestly offers user-agent switching alongside broader testing features.

Safety Notes

  • Only install user-agent switchers from the official Chrome Web Store.
  • Using user-agent switching for deceptive purposes may violate website terms of service.
  • Review permissions carefully.

What Not to Do

  • Do not install random CRX files from unknown download sites.
  • Do not assume a similar name means it is from the same developer.
  • Do not grant broad permissions without checking the developer.
  • Export settings before removing old extensions if you still need the configuration.

Frequently Asked Questions

Sources

Sources

Last updated: May 21, 2026

Independent guide. Not affiliated with Google, Chrome, Chrome Web Store, or listed extension developers.