SeedCrypt encrypts your mnemonic phrases with AES-256 and stores them on your own media — USB key, external disk. Zero cloud. Zero network. Zero compromise.
Mnemonic phrase
Password
Storage
Your seed phrase gives full access to your crypto wallet. Storing it in plain text — on paper, in a text file, in your notes — is an unnecessary risk.
Fire, water damage, tearing. One incident and your wallet is inaccessible forever.
iCloud, Google Drive, Notion… One account compromise and your seed is exposed.
Automatically synced to your photo backups. Accessible from any connected device.
Military-grade encryption with 600,000-iteration key derivation resistant to brute-force and dictionary attacks.
No data ever leaves your device. SeedCrypt works without internet. Zero telemetry, zero analytics in-app.
Store on USB key, external disk or local folder. Backup simultaneously to multiple locations. Auto-detection on connection.
Export your encrypted seed as a scannable QR code or printable PDF for a secure physical backup. Black-on-white for reliable scanning.
Native app on both platforms. Your encrypted seeds are fully interoperable between Windows and Android.
Releases published on GitHub. No surprise binary, no hidden updater. Download once, use forever, fully air-gapped.
Progressive lockout after failed attempts. Your seed stays protected even if the device is lost or stolen.
Clipboard automatically cleared 30 seconds after copying a decrypted seed. Decrypted text auto-hides after 60 seconds.
License validated locally via HMAC-SHA256. No activation server, no phone home. Works permanently without internet.
Type your 12 or 24 BIP39 words directly into the app. SeedCrypt never sends them anywhere — all operations run locally, offline.
Your password is stretched through PBKDF2-SHA512 (600,000 iterations) into the AES-256 key. It is never stored anywhere.
Select your USB key, external disk or local folder. The encrypted .json file is saved. Unreadable without your password.
"Finally a tool that doesn't require trusting a third party. My seeds are on a USB key, encrypted, and only I know the password."
— Marc T., Bitcoin holder since 2017
"I manage wallets for my whole family. The Family license is perfect — 3 devices and up to 15 seeds. The QR export is a great bonus."
— Sophie L., Family plan user
"AES-256-GCM with 600k PBKDF2 iterations — that's a serious crypto stack. Exactly what I was looking for to replace my paper backup."
— Alex K., Security engineer
No subscription. Pay once, use for life. No activation server.
Discover SeedCrypt
One-time payment
One-time payment
One-time payment
No. SeedCrypt works entirely offline. There is no network call, no telemetry, no analytics inside the app. Your data never leaves your device.
The password is never stored. It exists only in your head. If lost, the seed is irrecoverable — that is exactly what makes AES-256 secure. Store your password in a safe place, separate from your storage media.
Yes. Encrypted files are fully interoperable between Windows and Android. A Family license allows 3 devices, Business is unlimited. The free version is limited to 1 device.
AES-256-GCM for authenticated encryption, with PBKDF2-SHA512 at 600,000 iterations for key derivation. A unique random salt and IV are generated for every encryption. This combination exceeds NIST recommendations and is resistant to brute-force, dictionary and side-channel attacks.
Yes, refund within 14 days, no questions asked. Contact [email protected] with your license key.
License keys are validated locally using HMAC-SHA256 with a key embedded in the app. No activation server, no internet required. Your license works forever, even without a network connection.
Free to start. No sign-up required. Works without an internet connection.
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