AES-256-GCM on device
Seal text locally with Web Crypto before you paste it into another app.
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Live on Google Play
Quantext: Encrypt Text
Seal notes with on-device AES-256-GCM and paste the envelope into apps you already use.
Overview
About Quantext
Quantext is a compact text vault, not a messenger. Type a note, choose a labeled key, and seal it with Web Crypto AES-256-GCM on the device. Copy the envelope into SMS, email, or any thread you already have. Quantext does not host messages or keys and does not require an account. Share the sealed text and the secret separately.
Labeled keyring
Keep multiple shared secrets with nicknames so you can tell them apart on the same phone.
No Quantext account
Messages and keys are not hosted by Knox. You stay in control of the shared secret.
Vault lock & Premium
Free users can manage up to four usable labeled keys. Premium adds unlimited keys, ad-free use, and a vault passphrase that blurs nicknames from shoulder-surfing.
FAQ
Common questions
Is Quantext a chat app?
No. It seals text you paste elsewhere. Recipients need the matching key (and usually Quantext) to unlock the envelope.
What encryption does Quantext use?
On-device AES-256-GCM via Web Crypto. Knox does not host the sealed notes or the keys.
Does Quantext require an account?
No. Generate keys and unlock messages locally without signing up.
Download Quantext today
Available now on Google Play. Built and maintained by Knox Studios.