I analyzed what happens when you upload a photo to 5 popular free image compression sites. ...
I analyzed what happens when you upload a photo to 5 popular free image compression sites.
The Test
I uploaded a 4.2MB photo to each service and monitored network requests. Results:
Service A: File sent to their CDN (AWS us-east-1). 12 analytics trackers fired simultaneously.
Service B: File uploaded, but 5 minutes later a second request sent the file to a different domain.
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