Decrypt Shielded Memo
Decode encrypted memos from Zcash shielded transactions
100% Client-Side Decryption
Your viewing key never leaves your browser. All decryption happens locally using WebAssembly.
Decrypt Single Message
Enter TX ID and viewing key
Starts with uviewtest (testnet)
Enter a transaction ID and viewing key to decrypt the memo...
How to Get a Viewing Key
To decrypt memos, you need a Unified Full Viewing Key (UFVK). This key allows you to view transaction details without exposing your spending keys.
Compatible wallets:
Frequently Asked Questions
How do I decrypt a Zcash memo?
Enter the transaction ID and your Unified Full Viewing Key (UFVK) in the tool above. CipherScan decrypts the memo entirely in your browser using WebAssembly. Your viewing key is never sent to any server.
Is it safe to use my viewing key here?
Yes. All decryption happens client-side in your browser. Your viewing key never leaves your device. A viewing key only allows reading transactions, it cannot spend your funds.
What is a Zcash encrypted memo?
Zcash encrypted memos are 512-byte messages attached to shielded (Sapling and Orchard) transactions. They are encrypted so only the recipient can read them, and can contain text messages, payment references, or any arbitrary data.
Where do I get a viewing key?
Export a Unified Full Viewing Key (UFVK) from compatible wallets: YWallet (mobile & desktop), Zkool (mobile), or Zingo CLI (command-line). The UFVK allows viewing transactions without spending ability.
Which transaction types are supported?
This tool supports decrypting memos from both Sapling and Orchard shielded transactions. Transparent transactions do not have encrypted memos. Use the Inbox Scanner to scan multiple transactions at once.
Can I scan all my transactions at once?
Yes. Switch to the "Inbox" tab to use the Encrypted Inbox Scanner. It scans recent Orchard transactions on the Zcash blockchain and decrypts any that match your viewing key, all within your browser.
About Zcash Memo Decryption
Zcash is unique among cryptocurrencies in offering encrypted memos attached to shielded transactions. These memos allow users to include private messages, payment references, invoice numbers, or any arbitrary data, all protected by the same zero-knowledge cryptography that shields transaction amounts and addresses.
The CipherScan Decrypt Memo tool is a free, open-source utility that lets you decode these encrypted messages directly in your web browser. Unlike other tools that require running a full Zcash node or using command-line interfaces, CipherScan provides a simple web interface powered by WebAssembly for instant, private decryption.
Whether you need to verify a payment memo, read a private message, or audit your shielded transaction history, CipherScan's decrypt tool handles Sapling and Orchard transactions with zero-knowledge proof verification, all without your viewing key ever leaving your browser.