How to Encrypt a File on Windows, Mac, iPhone & Android (No Install)

Every platform has a different way to encrypt files, and most of them are annoying. Windows makes you buy Pro for BitLocker. Mac makes you create a disk image. iPhone and Android don't have any built-in option. Chromebook basically ignores the concept entirely.

A browser-based tool works on all of them. One tool, one method, every device.

Windows (10 / 11 / Home / Pro)

Option 1: Browser-based tool (all editions, no install)

1. Open the File Password Protector in Chrome, Edge, or Firefox.
2. Drop your file in. Set a password. Click encrypt.
3. Download the .enc file. Done.

Works on Windows Home, Pro, Education, Enterprise — all editions. No admin privileges, no software install, no setup.

Option 2: 7-Zip (free, requires install)

Right-click any file or folder → 7-Zip → Add to Archive. Choose .7z format, set a password, check "Encrypt file names." This creates an AES-256 encrypted archive. Good for encrypting multiple files at once.

Option 3: BitLocker (Pro only)

Right-click a drive → Turn on BitLocker. This encrypts the entire drive, not individual files. Only available on Windows Pro/Enterprise. If you have Windows Home, this option does not exist.

Option 4: EFS (Pro only)

Right-click a file → Properties → Advanced → Encrypt contents. This ties the encryption to your Windows user account. The file is automatically decrypted when you open it while logged in. Not available on Windows Home.

macOS

Option 1: Browser-based tool (fastest)

Same process as Windows. Open the tool in Safari, Chrome, or Firefox. Drop file in, set password, download .enc file.

Option 2: Disk Utility encrypted disk image

1. Open Disk Utility (Applications → Utilities).
2. File → New Image → Image from Folder (or Blank Image).
3. Choose 256-bit AES encryption.
4. Set a password.
5. The .dmg file is encrypted. Mount it with the password to access files.

This creates a container, not a single encrypted file. Useful for encrypting a group of files.

Option 3: Terminal with GPG or OpenSSL

gpg -c --cipher-algo AES256 filename creates an encrypted .gpg file. The recipient needs GPG to decrypt. Good for tech-savvy users; not practical for sharing with non-technical people.

iPhone / iPad

iOS has no built-in file encryption tool for individual files. Your options:

Option 1: Browser-based tool (recommended)

1. Open the File Password Protector in Safari.
2. Tap the upload area. Select the file from Files, iCloud Drive, or another location.
3. Enter a password. Tap Encrypt.
4. The .enc file saves to your Downloads in the Files app.

What about Notes app?

You can lock individual notes in the Apple Notes app with a password. But this only works for notes — not for arbitrary files like PDFs, images, or documents.

Android

Android also lacks built-in individual file encryption. Samsung has Secure Folder (app-level lock), but it doesn't encrypt files — it hides them behind a PIN.

Option 1: Browser-based tool (recommended)

1. Open the File Password Protector in Chrome.
2. Select your file from phone storage or Google Drive.
3. Enter a password. Tap Encrypt.
4. Download the .enc file.

What about Samsung Secure Folder?

Secure Folder hides files and apps behind a PIN or biometric lock. It protects against someone picking up your phone, but the files are not encrypted independently. If the file is copied out of Secure Folder (via USB, cloud sync, etc.), it has no protection.

Chromebook

Chrome OS does not support traditional desktop encryption software. Your best option is the browser-based tool — it's the natural fit since everything on a Chromebook runs in Chrome. Same process as any other device.

Cross-Platform Summary

Device	Best Free Option	Alternative
Windows Home	Browser-based tool	7-Zip
Windows Pro	Browser-based tool or BitLocker	7-Zip, VeraCrypt
macOS	Browser-based tool	Disk Utility, GPG
iPhone / iPad	Browser-based tool (Safari)	Notes lock (notes only)
Android	Browser-based tool (Chrome)	Samsung Secure Folder (hides, not encrypts)
Chromebook	Browser-based tool	No other free option
Linux	Browser-based tool	GPG, OpenSSL, VeraCrypt