Questions, without the fine print.

Anyone who has the complete share link, including the part after #. Treat that link like a secret.

No during normal operation. The key is kept in the URL fragment after #, and browsers do not send that fragment to the server in HTTP requests.

The filename, MIME type, metadata and file chunks are encrypted in your browser before upload. The server still sees technical metadata such as transfer ID, sizes, timestamps, node and request information.

SendZero cannot reconstruct the decryption key for you. Without the complete link, the encrypted file cannot normally be decrypted.

The current limit is 5 GiB per file. Files are split into 8 MiB chunks so the browser does not need to keep the entire file in memory.

Yes. Select the same local file again in the same browser. SendZero can reuse the local upload state and send only missing encrypted chunks while that upload session is still valid.

Yes in supported Chromium-based browsers using the File System Access API. Other browsers may use streaming or Blob fallbacks that do not support resume after a browser restart.

After the first successfully completed download, the encrypted server copy is deleted. An interrupted authenticated download can still resume instead of consuming the transfer immediately.

Yes. The sender receives a separate private delete capability. Use Delete transfer now or the Recent transfers panel in the same browser.

Only local sender-side information needed to revoke recent transfers, including the transfer and node IDs plus the delete capability. This list stays in that browser and disappears when browser storage is cleared or entries expire.

Its encrypted server copy is removed by cleanup and the share link stops working. SendZero is a temporary transfer service, not a backup service.

SendZero applies abuse, concurrency, disk-capacity and download-traffic limits so one anonymous user or link cannot exhaust the service for everyone else.

No. Sending and receiving files does not require registration or a SendZero account.

Email abuse@sendzero.link with the SendZero transfer URL and a clear description. Do not include the decryption key unless it is necessary for the report.