Is Smallpdf—Edit, Convert, Compress, & AI Summarize PDF safe?

Legitimate PDF productivity extension from Smallpdf. Content script on all URLs supports PDF upload and AI summarization features; analytics events and a GeoIP lookup are transmitted to Smallpdf-owned infrastructure. One postMessage handler in iframe.html accepts messages from any origin, but the calling code only sends the current tab URL for user-initiated file uploads to the Smallpdf service.