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File Encryptor

Encrypt and decrypt files with a password

Click or drop a file here

About File Encryptor

File Encryptor is a free online tool that obfuscates any file with a password-based XOR cipher, entirely in your browser — no upload, no software installation. It's a quick way to make a file unreadable to a casual viewer without the password, though it is not a substitute for strong encryption standards like AES when protecting highly sensitive data.

How to use File Encryptor

  1. 1Choose "Encrypt" or "Decrypt" mode — the underlying operation is the same XOR process either way.
  2. 2Click the upload area and select the file you want to process.
  3. 3Enter a password — this becomes your key, so make sure you remember it exactly.
  4. 4Click the button to process the file, then download the result.

Frequently Asked Questions

Is File Encryptor free to use?

Yes, it's completely free with no signup and no limit on how many files you can process.

What kind of encryption does it use?

A password-based XOR cipher applied to every byte of the file. It's a fast way to obfuscate a file so it isn't readable without the password, but it is not equivalent to strong standards like AES and shouldn't be relied on to protect highly sensitive or confidential data.

What file types can I process?

Any file type — there are no format restrictions since the cipher works on raw bytes.

What happens if I forget my password?

The file can't be restored without the exact original password — XOR decoding requires the identical key, and there's no recovery option.

Tips & Tricks

  • ✓Because XOR is symmetric, running the same password through "Decrypt" simply reverses whatever "Encrypt" did — the two modes only change the button label and the downloaded file's name.
  • ✓Use a password you'll remember exactly — even one character off will produce garbled, unrecoverable output.
  • ✓This tool suits casual privacy (keeping a file unreadable at a glance), not protecting data against a determined attacker.
  • ✓Always keep a backup of your original file — there's no way to verify the password before downloading, so mistakes can't be undone afterward.