PII Viewer for Google Analytics

PII Viewer for Google Analytics is a browser extension for Chromium-based browsers such as Microsoft Edge and Google Chrome. It allows you to map the user ID stored in Google Analytics to locally stored personally identifiable information (PII) such as name and email address.

Mailchimp in GA - with PII

Add to Microsoft Edge

How it works

Sending personally identifiable information (PII) to Google Analytics is strictly prohibited, but sending a unique user ID is in a custom dimension is permitted. This extension allows you to map the user ID stored in Google Analytics to locally stored PII such as name and email address.

Rather than building your own custom integration to map this data together, you can simply reference a locally stored CSV file (or use the in-built Mailchimp integration) and let this extension do the hard work. This means that you full comply with the Google Analytics privacy policy, but get to understand your visitor data.


PII Viewer for Google Analytics now supports identifying users in Behaviour Flow and Mailchimp integration.




Compliance with Google Analytics Terms of Service

This extension uses PII which is locally stored only, therefore this extension is fully compliant with the Google Analytics Terms of Service.

Contacts at Google have confirmed that the extension is compliant with the terms of service.

Data security and privacy statement

We do not read your data.

Our extensions are served by static files, and as such, store no data. All markup is rendered client-side, so no data is transmitted to our servers.

Any configuration data saved is saved within your browser on your own computer and only accessed by client-side JavaScript.


We do not read your data.

We do however reserve the right to track usage with web analytics software such as Google Analytics.

Google Analytics

Our extensions use Google Analytics. Items currently being tracked by Google Analytics:

  • Options page loadServer Base URL – e.g. /options.html
  • Some events such as button clicks on the options page – Attempts to upload a file into your browser – Whether the upload was successful or not – A count of how many users were in the file, but not their details – When the user mapping is updated

If you found this browser extension useful, why not say thanks by buying me a pot of tea to contribute to its maintenance. I don’t do coffee.