Compare Chrome extensions: Chrome Connectivity Diagnostics vs ScanQR

Stats Chrome Connectivity Diagnostics Chrome Connectivity Diagnostics ScanQR ScanQR
User count 1,000,000+ 3,000,000+
Average rating 4.29 2.88
Rating count 714 187
Last updated 2016-01-12 2019-03-05
Size 712.70K 53.77K
Version 1.2.1 0.0.4.0
Short description
Chrome Connectivity Diagnostics is a fast and simple network testing and troubleshooting tool for Chrome and Chrome OS. The tool… Scans QR codes using your webcam.
Full summary

Chrome Connectivity Diagnostics is a fast and simple network testing and troubleshooting tool for Chrome and Chrome OS.

The tool tests a computer's network connection for common issues, port blocking, and network latency by establishing connections to network and Internet services via UDP, TCP, HTTP and HTTPS.

The diagnostic tests include: • Local network connection availability • Wifi network signal strength (Chrome OS only) • Default gateway is reachable (Chrome OS only) • DNS server availability and latency • DNS cache poisoning/spoofing • Internet traffic blocks by a HTTP captive portal or firewalls • Network performance and latency to Google websites • Google Hangouts service availability

What's new

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Scans QR codes and displays their contents on a Chromebook or other computer with a suitable webcam. What's a "suitable" webcam? It's one that can focus the QR code within the red square in the app sharply enough that the app can decode it. My test results:

  • Chromebook Pixel: yes
  • Samsung ARM Chromebook: yes
  • Acer C7 Chromebook: yes
  • CR48: yes
  • 2009 MacBook Pro: yes, except for very small, dense QR codes
  • 2011 iMac: no, unless the QR code is ridiculously large (over one foot across)

If Chrome implements an API to let developers adjust camera-focus settings, I'll be able to improve the app to work with more cameras.

Source: https://github.com/sowbug/scanqr-app