Encrypt text privately with our AES-256-GCM Encryptor. Your text never leaves your browser.
Why encrypt prompts before sending them to an AI assistant?
When you paste a prompt into a chat assistant, you are sending the text to a service that may log, review, or use it for training depending on the provider's settings. For a personal question this is usually fine. For source code, customer records, or a business plan it can be a real leak.
Encrypting the text first converts the sensitive content into ciphertext. The assistant only sees unreadable data, while you keep the password that can decrypt it. The content stays usable to you and meaningless to everyone else.
- Avoids exposing proprietary code and internal architecture details
- Protects customer data before it enters a third-party service
- Reduces the damage if a chat log is breached or audited
What encrypting does and does not protect
Think of encryption as a seal around your message, not invisibility. Anyone who sees your traffic still knows you are using an AI assistant, and the encrypted payload is visible in your chat history.
- Protects: prompt content, pasted source code, internal names, formulas
- Does not protect: metadata, the fact that you use the service, the password if you share it insecurely
Note: If your company has a policy against sending code to external AI services, encryption is not a substitute for that policy. It is a technical control, not a compliance approval.
How to encrypt text before sending: step by step
- Open the AES-256-GCM Encryptor in your browser.
- Select the text mode and paste the content you want to protect.
- Enter a strong password. A phrase of 16+ random characters is a good starting point.
- Click Encrypt and copy the ciphertext output.
- Paste the ciphertext into ChatGPT as your prompt.
- Store the password in a password manager; share it with a collaborator only out of band if they need to decrypt.
Note: You can also generate a strong password with the [Password Generator](/en/password) before encrypting.
Practical limits
- The assistant cannot help you with the encrypted content. You must decrypt it locally to continue working.
- If you lose the password, the data is unrecoverable by design.
- Sending the password in the same chat or email as the ciphertext defeats the purpose.
- Encryption protects confidentiality, not availability; GCM authentication additionally detects tampering.
FAQ
Q.Is encrypting prompts before sending them to ChatGPT worth it?
A.If you regularly paste confidential text such as source code, credentials, or customer data into AI tools, yes. It converts a high-impact leak into a low-impact one with a few extra seconds of work.
Q.Can I send the password together with the ciphertext?
A.No. Sending the password through the same channel as the ciphertext removes the protection. Use a password manager or a separate secure channel.
Q.Does ZeyroVault upload my text when I encrypt it?
A.No. The encryptor runs entirely in your browser with the Web Crypto API. Your text and files never leave your device, so there is nothing to upload or store.
References
- NIST SP 800-38D – Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM): https://csrc.nist.gov/pubs/sp/800/38/d/final
- RFC 5116 – An Interface and Algorithms for Authenticated Encryption: https://www.rfc-editor.org/rfc/rfc5116
Encrypt a prompt
AES-256-GCM in your browser; the text never leaves your device.
Encrypt first, paste second
One encryption step turns a possible leak into a non-event: the assistant stores ciphertext, and only you hold the password.
Keep the password in a password manager and share it out of band. Do the encryption in the AES-256-GCM Encryptor.