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Fiddler icon Configuring Android / Google Nexus 7

Get Traffic to Fiddler

Fiddler runs as a proxy on port 8888 on your Windows PC; you can easily proxy traffic from your Google Nexus device through Fiddler to debug it.

Note: The "Device Debugging" topic is covered in greater depth in the Fiddler Book.

1. In Fiddler, click Tools / Fiddler Options / Connections and ensure that the box Allow remote computers to connect is checked. (Restart Fiddler if this box wasn't already checked.)

2. Note the IP Address of the Fiddler PC; you can see this by hovering over the icon in the toolbar:

3. On the Nexus, swipe down from the top and push the Settings icon. Click the Wi-Fi entry and select your current Wi-Fi network.

4. Tap and hold and choose Modify Network

5. Check the Show advanced options box.

6. Choose Manual from the Proxy settings dropdown.

7. Fill in the IP Address and port (8888) of the PC running Fiddler.

8. Tap Save to save the change.

9. In Chrome, visit http://ipv4.fiddler:8888/ and ensure that you see the traffic in Fiddler, and that Chrome shows the Fiddler Echo Service webpage.

After you complete your tests, return to the Proxy Settings screen and remove the proxy.

Note: Some Android applications may not respect the system's proxy setting.

Decrypt HTTPS

After you have basic proxying working, the next step is to get HTTPS decryption working.

1. On the Fiddler Echo Service Webpage, click the FiddlerRoot Certificate link at the bottom. Or, tap and hold and choose Open in new tab.

2. If the download doesn't open automatically, swipe down from the top and click the Settings icon.

3. Click Personal > Security. In the Credential storage section, click Install from storage. Pick the FiddlerRoot.cer file. Type a name for the certificate if you'd like.

4. After installing the certificate, you can click the Trusted credentials item and then click User to see the Fiddler certificate. After you have completed your testing, you can delete the certificate here. 

Note: On some Android Devices, you may need to use the Certificate Maker plugin to generate certificates.

Note: Some websites (e.g. use a technique called "Certificate Pinning" and may not work with Fiddler's certificates.

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©2018 Eric Lawrence