UNII
What is the UNII App?
UNII is a secure file sharing app that lets you create password-protected .unii files containing images, videos, or PDFs. Every file is encrypted with military grade protection entirely on your device — nothing is uploaded to any server.
Unlike regular sharing, UNII gives you full control after sharing. You choose if the recipient can save the content, and you can revoke access at any time — even after the file has been sent.
Download the UNII App
What Can You Do with the UNII App?
Lock Files with a Password
Encrypt any image, video, or PDF into a password-protected .unii file. Without the password, the content is completely inaccessible.
Unlock Received Files
Open .unii files sent to you by entering the password. View images, videos, and PDFs securely within the app.
Control Saving
Decide if recipients can save the decrypted content to their device or only view it within the app.
Revoke Access Anytime
Disable access to any file you've shared at any time. Once revoked, the file can never be opened again.
How the UNII App Works
Sending a Secure File
Pick a file
Select an image, video, or PDF from your device.
Set password & permissions
Create a password and choose whether the recipient can save the content.
Share the .unii file
Send it via WhatsApp, email, AirDrop, or any sharing method. Share the password separately.
Receiving a Secure File
Tap the .unii file
The file opens in the UNII app automatically. Or pick it manually from the unlock screen.
Enter the password
Type the password shared by the sender to decrypt the file.
View or save
See the content in the app. Save it to your device if the sender allowed it.
Privacy & Security
Your Files Stay on Your Device
UNII encrypts and decrypts everything locally on your device. Your images, videos, PDFs, and passwords are never uploaded to any server. No one — not even UNII — can access your content. Read our privacy policy for details.
Frequently Asked Questions
What is the UNII app used for?
UNII is used to share images, videos, and PDFs securely. It encrypts files into password-protected .unii files that only the recipient can open with the correct password.
Is the UNII app free to download?
Yes. The UNII app is free to download on both Android and iOS. Creating and opening files uses credits within the app.
Is the UNII app available on iPhone?
Yes. UNII is available on the App Store for iPhone and iPad, and on the Google Play Store for Android devices.
Is the UNII app safe to use?
Yes. All encryption happens on your device. Your files are never sent to or stored on any external server. UNII uses military grade protection to secure your content.
Can I use UNII to share files on WhatsApp?
Yes. After creating a .unii file, you can share it directly through WhatsApp, Telegram, Signal, email, AirDrop, Bluetooth, or any other sharing method.
What happens if I delete the UNII app?
Any .unii files you created will remain on your device and wherever you shared them. However, you will need the app to open .unii files or manage access permissions.