SecureText

BlackFinger

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About this app

Secure Text — 100% offline. 100% secure.

Encrypt and decrypt any text with AES-256 encryption. Everything runs locally on your device — no internet, no cloud, no server, no accounts. Your data never leaves your phone.

100% offline means 100% secure.

No network connection needed — works anywhere, anytime
No cloud storage — nothing is uploaded, nothing can be leaked
No accounts — no sign-up, no login, no tracking
No data collection — zero information stored externally
How it works:

Paste or type any text
Set your password
Encrypt — your text becomes an unreadable code string
Share the encrypted string through any app (email, chat, SMS — it's just text)
Only someone with the password and this app can decrypt it back to the original
Encryption details:

AES-256-CBC — the same standard used by governments and banks
PBKDF2 key derivation with 65,536 iterations — makes brute-force attacks impractical
Random salt and IV per encryption — identical text produces different ciphertext every time
Self-contained output — one Base64 string contains everything needed for decryption
No metadata, no headers, no identifiable patterns
Use it for:

Sending sensitive messages through any chat app
Storing private notes and passwords safely
Sharing credentials with trusted contacts
Keeping personal writings truly private
Simple. Fast.

What’s new

Kick off.