File Encryptor — Encrypt File Online
This tool password-protects any file with strong, industry-standard encryption
This tool password-protects any file with strong, industry-standard encryption
How to use File Encryptor — Encrypt File Online
- Choose Encrypt mode, pick any file, and enter a strong password twice.
- Click Encrypt & download to save the password-locked .ebtenc file.
- To restore it, switch to Decrypt mode, choose the .ebtenc file, enter the same password, and download the original.
About File Encryptor — Encrypt File Online
This tool password-protects any file with strong, industry-standard encryption. Pick a file, set a password, and it produces a locked .ebtenc file that only that password can open. To get your file back, switch to Decrypt mode, choose the .ebtenc file, and enter the same password. It works on any file type — documents, images, ZIPs, spreadsheets, videos — because it encrypts the raw bytes.
Under the hood it uses your browser's built-in Web Crypto API. Your password is stretched into a 256-bit key with PBKDF2 (SHA-256, 250,000 rounds) using a random salt, and the file is encrypted with AES-256 in GCM mode, which also verifies the file hasn't been tampered with. The output stores the salt, a random nonce, and the original filename alongside the ciphertext so decryption is self-contained. Everything happens locally: the file and password never leave your device and nothing is uploaded to any server.
Two honest limits. First, there is no password recovery — if you forget the password, the file genuinely cannot be opened, so store it somewhere safe. Second, the .ebtenc format is specific to this tool; it isn't a standard container, so decrypt files here rather than expecting other apps to open them. Very large files are limited by your device's available memory since the whole file is processed in the browser.
Frequently asked questions
- How does the encryption actually work?
- Your password is converted into a 256-bit key using PBKDF2 with SHA-256 and 250,000 iterations plus a random salt, then the file is encrypted with AES-256-GCM. These are the same standards used by password managers and secure messaging apps.
- Is my file uploaded anywhere?
- No. All encryption and decryption runs in your browser using the built-in Web Crypto API. Your file and password never leave your device, and the tool makes no network requests.
- What happens if I forget the password?
- The file cannot be recovered. There is no backdoor or reset — that is the point of real encryption. Store your password somewhere safe, like a password manager, before you rely on the encrypted copy.
- What file types can I encrypt?
- Any file. The tool encrypts the raw bytes, so PDFs, images, ZIPs, spreadsheets, videos, and anything else all work the same way. The original filename is preserved and restored when you decrypt.
- Can I open the .ebtenc file in another program?
- No. The .ebtenc container is specific to this tool. Decrypt it here using Decrypt mode and the original password to get the original file back in its normal format.
- Why does it say the password is wrong when I try to decrypt?
- AES-GCM verifies both the password and the file's integrity. A wrong password, or a file that was edited or corrupted, both cause decryption to fail. Re-check the password and make sure you're using the exact .ebtenc file this tool produced.