Free Encrypted File Transfer
A download link (for file recipient) will appear below.
How is this web-based file transfer different?
Will the note to recipient be encrypted?
How will the file be delivered?
Can anyone with the link access the file?
Unlike every embedded service (read: Google Drive, Microsoft OneDrive, iCloud, Dropbox, etc.), all data is client-side encrypted before being sent. The key required for decryption stays in your browser - it is never shared with FileSender.io.
Both, the file name and the note to recipient (if any) are fully encrypted.
Via a unique, one-time download link generated locally by your browser. You would provide the link to your recipient by E-mail, text, or chat.
Yes, the link is sensitive, though unguessable. You should pass the link only to the intended party for the download. For extra security, a download link can only be used once. After the first successful download, the link becomes invalid. Once your intended recipient downloads the file, no one else can.
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Decryption is only possible with the URL fragment, which stays locally with the sender. The URL fragment contains a secret key generated by sender's browser and is never sent to our servers, even when the link is clicked. This behavior is by design in all modern browsers.
Is there a size limit for sending a file through a browser?
Depending on your browser version and available virtual memory, you may experience issues uploading/downloading files greater than 8 Gb. For larger files, download the File Sender Desktop App, which has no size limitations.