How does it work?
This tool uses the Web Crypto API built directly into your browser. When you select a file, we generate a unique cryptographic key from your password using PBKDF2 with a random salt.
The file is then processed using the AES-GCM algorithm (Advanced Encryption Standard in Galois/Counter Mode). This ensures both the confidentiality and integrity of your data. The process happens entirely in your device's memory.
Why is this secure?
- Client-Side Only: Your files are never uploaded to any server. Even we cannot see them.
- Zero Knowledge: Since we don't store your password or keys, only you can decrypt your data.
- Industry Standard: AES-GCM is the same encryption standard used by banks and governments.
Frequently Asked Questions
Is it safe to use this for sensitive documents?
Yes. The encryption happens locally on your computer. The file never travels over the internet, eliminating the risk of interception.
What happens if I lose my password?
Because this is a "Zero Knowledge" tool, we do not store your password. If you lose it, the file cannot be recovered. Please remember your password.
Is there a file size limit?
Technically no, but browser memory limits apply. For the best performance and stability, we recommend files under 500MB.