About the Encrypt/Decrypt Tool
This local-only tool allows you to encrypt and decrypt sensitive text or files using strong cryptography
— directly in your browser, without any data ever leaving your device.
It’s designed for safe use on public Wi-Fi networks (coffee shops, hotels, airports) where you may not
trust the network but still need to exchange confidential messages or protect sensitive documents.
Privacy First: This tool operates entirely offline using the browser’s native
Web Crypto API. It uses AES-256-GCM with PBKDF2 (SHA-256) key derivation.
How to Use It
- Select whether you want to encrypt or decrypt.
- Enter your text or upload a file.
- Provide a strong passphrase (or generate one).
- Click “Process” and copy or download the result.
- Use the exact same passphrase to decrypt.
Best Practices
- Always use long, random passphrases. The tool can generate one for you.
- Never reuse encryption passphrases across different purposes or people.
- Store encrypted files securely, and share passphrases through trusted channels only.
- If you’re unsure about a result, test decryption before deleting originals.
Legal Disclaimer: This tool is provided “as-is” with no warranty of any kind. It is your responsibility to use it legally and ethically. We are not liable for any data loss, security incidents, or misuse. Using encryption may be regulated or restricted in certain jurisdictions. Always comply with your local laws and regulations.