> Size of the files can be large in many GBs. > Security is the main concern. > Tool should be web based. From your question it kinda sounds you actually hav

> Size of the files can be large in many GBs. > Security is the main concern. > Tool should be web based. From your question it kinda sounds you actually have 3 main concerns, not just security. I can't give you any suggestions for web based tools but I can suggest: 1. Obtain a public SSH key out-of-band with the party that needs the large file and give them access to an SFTP share with that key. 2. Upload the file to a private S3 bucket and send them a signed link[1] [1] https://docs.aws.amazon.com/AmazonS3/latest/userguide/ShareObjectPreSignedURL.html https://docs.aws.amazon.com/AmazonS3/latest/userguide/ShareO...