# File Sharing and Sync

Discover how to privately share your files between your devices, with your friends and family, or anonymously online.

## File Sharing¶

### Send¶

Recommendation

Send is a fork of Mozilla’s discontinued Firefox Send service which allows you to send files to others with a link. Files are encrypted on your device so that they cannot be read by the server, and they can be optionally password-protected as well. The maintainer of Send hosts a public instance. You can use other public instances, or you can host Send yourself.

Send can be used via its web interface or via the ffsend CLI. If you are familiar with the command-line and send files frequently, we recommend using the CLI client to avoid JavaScript-based encryption. You can specify the --host flag to use a specific server:

ffsend upload --host https://send.vis.ee/ FILE


### OnionShare¶

Recommendation

OnionShare is an open-source tool that lets you securely and anonymously share a file of any size. It works by starting a web server accessible as a Tor onion service, with an unguessable URL that you can share with the recipients to download or send files.

### Criteria¶

Please note we are not affiliated with any of the projects we recommend. In addition to our standard criteria, we have developed a clear set of requirements to allow us to provide objective recommendations. We suggest you familiarize yourself with this list before choosing to use a project, and conduct your own research to ensure it's the right choice for you.

This section is new

We are working on establishing defined criteria for every section of our site, and this may be subject to change. If you have any questions about our criteria, please ask on our forum and don't assume we didn't consider something when making our recommendations if it is not listed here. There are many factors considered and discussed when we recommend a project, and documenting every single one is a work-in-progress.

• Must not store decrypted data on a remote server.
• Must be open-source software.
• Must either have clients for Linux, macOS, and Windows; or have a web interface.

## FreedomBox¶

Recommendation

FreedomBox is an operating system designed to be run on a single-board computer (SBC). The purpose is to make it easy to set up server applications that you might want to self-host.

## File Sync¶

### Nextcloud (Client-Server)¶

Recommendation

Nextcloud is a suite of free and open-source client-server software for creating your own file hosting services on a private server you control.

Danger

We don't recommend using the E2EE App for Nextcloud as it may lead to data loss; it is highly experimental and not production quality.

### Syncthing (P2P)¶

Recommendation

Syncthing is an open-source peer-to-peer continuous file synchronization utility. It is used to synchronize files between two or more devices over the local network or the internet. Syncthing does not use a centralized server; it uses the Block Exchange Protocol to transfer data between devices. All data is encrypted using TLS.

### Criteria¶

Please note we are not affiliated with any of the projects we recommend. In addition to our standard criteria, we have developed a clear set of requirements to allow us to provide objective recommendations. We suggest you familiarize yourself with this list before choosing to use a project, and conduct your own research to ensure it's the right choice for you.

This section is new

We are working on establishing defined criteria for every section of our site, and this may be subject to change. If you have any questions about our criteria, please ask on our forum and don't assume we didn't consider something when making our recommendations if it is not listed here. There are many factors considered and discussed when we recommend a project, and documenting every single one is a work-in-progress.

#### Minimum Requirements¶

• Must not require a third-party remote/cloud server.
• Must be open-source software.
• Must either have clients for Linux, macOS, and Windows; or have a web interface.

#### Best-Case¶

Our best-case criteria represents what we would like to see from the perfect project in this category. Our recommendations may not include any or all of this functionality, but those which do may rank higher than others on this page.

• Has mobile clients for iOS and Android, which at least support document previews.
• Supports photo backup from iOS and Android, and optionally supports file/folder sync on Android.