Firefox Send

Need to send a file that’s too big for email or too sensitive for the cloud?

Firefox Send, developed by Mozilla, offers a straightforward solution for transferring files with end-to-end encryption. This tool focuses on secure, temporary file sharing without requiring an account. You control access, set expiration limits, and manage download counts directly from your Android device. The app functions as a portable, encrypted delivery system for any file you need to send privately.

Core functionality centers on three pillars: encryption, expiration, and control.
- Every file is encrypted on your device before upload, ensuring only the recipient with the unique link can decrypt it.
- You set a download limit (1 to 100 times) and an expiration time (5 minutes to 7 days). The link self-destructs after either condition is met.
- The app generates a one-time, time-sensitive URL. This link can be shared via any messaging app, email, or clipboard.

File handling is streamlined for mobile use.
- Select files directly from your device storage or share them from other apps via the Android share sheet.
- The app displays file size, estimated upload time, and remaining bandwidth before you send.
- A built-in progress indicator shows real-time upload status, with pause and resume capability for large files.
- Supported file types include documents (PDF, DOCX, XLSX), images (JPG, PNG, GIF), archives (ZIP, RAR), and more.

Security features operate transparently.
- No account creation is required for sending files up to 1 GB. For files up to 2.5 GB, a free Firefox account is needed.
- The encryption key is embedded in the URL (fragment identifier), never stored on Mozilla servers.
- Server-side logs are deleted after the file expires or is downloaded the maximum number of times.
- You can optionally set a password on the download link for an extra layer of protection.

User interface prioritizes clarity and speed.
- A single-tap interface: share, set options, and send in under 10 seconds.
- Dark mode support for reduced eye strain during night use.
- Notifications confirm when a download completes or when the link expires.
- History log tracks your recent sends with expiration status.

Key features at a glance:
- End-to-end encryption for all transfers
- Self-destructing links with time and count limits
- No account needed for files up to 1 GB
- Share via any app or clipboard
- Real-time upload progress and pause/resume

Download mobile app now

Install Firefox Send immediately for secure, temporary file sharing that puts you in control. No sign-ups, no tracking, no permanent storage. Get it now.

Technical disclaimer: This app requires an internet connection to upload and download files. End-to-end encryption applies only to the transfer, not to the recipient’s device after download. File size limits apply: 1 GB without an account, 2.5 GB with a free Firefox account. The app is compatible with Android 8.0 and above. Data usage may apply depending on your mobile plan. Age restrictions may apply in certain regions. The developer, Mozilla, does not retain access to encrypted file content. Use responsibly and avoid sharing sensitive information through unsecured channels.