How to Share Large Files Securely and Anonymously
When it comes to sharing large files, most free file-sharing platforms are not as secure as they claim. Popular services like WeTransfer, Dropbox, and Google Drive often log your IP address, scan your files, and may even hand over data when requested—putting your privacy at risk. To ensure your files are shared securely and anonymously, it’s crucial to use alternatives that minimize traceability.
Local Options
Local file transfers are the fastest and most secure, as they avoid using third-party servers and leave no digital trail.
1. LocalSend
For in-person transfers (e.g., home, office, family, friends), LocalSend provides a fast, end-to-end encrypted solution over local Wi-Fi or LAN. However, the main downside is that both devices must be on the same network.
LocalSend
2. Physical Transfer
You can use a USB drive or external hard drive to physically transfer files. Before handing it over, make sure to encrypt the drive using tools like Cryptomator or VeraCrypt. This method leaves no digital footprint, as there are no network interactions. However, it requires you can meet or use a trusted courier service, and there’s always the risk of interception during transport.
Remote Options
When in-person transfers aren’t possible, these remote options allow you to securely share files over the internet while maintaining anonymity.
1. OnionShare
Very popular file-sharing solution, OnionShare leverages the Tor network to send files over onion services. Since it uses Tor, your IP address remains hidden. There’s no file size limit, though transfers may be slower depending on your bandwidth and the Tor network’s speed. The recipient needs the Tor Browser to access the .onion link.
OnionShare
2. FilePizza
FilePizza is a browser-based, peer-to-peer (P2P) file-sharing tool built on WebRTC technology. The file is transferred directly from your browser to the recipient’s, without relying on any central server. This significantly reduces metadata exposure. However, the file size limit is restricted by your browser and device, and both parties must stay online throughout the transfer. For added anonymity, you can use Tor Browser while using FilePizza.
FilePizza
3. Encrypt First, Upload Anywhere
A simple yet effective way to secure any file transfer is to encrypt the file before uploading it to any cloud service. Here are a few encryption methods to ensure your file is safe:
Cryptomator: Encrypts files with a vault that looks like a regular folder to the cloud provider.
7-Zip: Creates an AES-256 encrypted archive with a password.
VeraCrypt: Encrypts entire containers for more robust security.
age: A minimalistic encryption tool with a simple command-line interface.
After encryption, you can upload the locked file to any cloud service (like Dropbox, Google Drive, or OneDrive) and send the password separately via a secure channel or in person.