Did they get my email?

How did they view it?

When and how many times did they view it?

Was it sent to anyone else?

Whohow.io is a free service that allows you track and breadcrumb when someone opens your emails, links (to websites, shared files on Dropbox and Onedrive, etc), and documents (Office 365, Google Docs, etc.). Please use this service responsibly. You must have a Google Account to login to use the service. This service does not store any sensitive data.

Invisible Pixel

Place an invisible pixel in your emails and documents. Tracks when a user opens the document or email.

Link Clicks

Track when a user clicks on a link. You choose where you want the link to forward to. This is great for shared Dropbox, Google Docs, and Office 365 docs.

Image Displays

Create a customer image URL from an image that is already available on the internet. Embed that image in your docs or emails and track when someone views it.


Place a confidential data / data disclaimer at the bottom of your email. When the disclaimer is viewed, usage will be tracked.

Sign In With Your Google Account
To help ensure proper usage of the service, please login to a valid Google account to access the Whohow.io app.