Encryption-Decryption
Encrypt or decrypt text locally with AES-256-GCM. Passphrase never leaves your browser.
About Encryption-Decryption
Encrypt and decrypt text using AES-256-GCM with PBKDF2 key derivation (100,000 iterations). Each encryption produces a unique ciphertext with random salt and IV. All processing happens locally in your browser. Need a strong passphrase first? Use the Password Generator.
Related: Password Generator · Hash Generator
Common Use Cases
- Secure local encryption
- Protecting sensitive text
- Shareable encrypted messages
- Learning cryptography
Tips
- Use a strong passphrase
- The same passphrase is needed to decrypt
- Output includes salt+IV so each encryption is unique
- Wrong passphrase shows a clear error
- Create a passphrase with the Password Generator
Frequently Asked Questions
Is this tool private?
Yes. The conversion runs in your browser, and your input is not uploaded to a server.
Can I copy the result?
Yes. Use the Copy Output button in the sidebar, or select the output field manually.
Does it work offline?
Once the page has loaded, the core transformation logic runs client-side without an API call.
What should I do with edge cases?
Use this for fast checks and formatting. For production-critical data, verify the result with the target runtime or standard.