Now that Firefox Send is out of Test Pilot, there's this convenient little CLI to upload your files quickly.
ffsend upload --copy mybigfile.blah
Link to the file is copied to clipboard. Paste in IMs, email etc.
There are more advanced options but using the web interface is more convenient for those.
"Mozilla receives an encrypted copy of the file you upload but we cannot access the content or name of your encrypted file. By default, files are stored for a maximum of either 24 hours or 7 days. If you choose a download cap, the file can be deleted from our server sooner."
The file is encrypted by the client before being sent to Google's servers on GCP.
framadrop.org also seems to be doing the same.
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