May 21, 2026 · 5 min read
Find your 64-digit WhatsApp encryption key
WhatsApp shows you the 64-character end-to-end backup key once. Where to tap to see it again on Android, how to store it safely, and what happens if you've lost it.
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The single biggest piece of WhatsApp data that's only ever shown to you is your 64-character end-to-end backup key. Lose it before you migrate, and your backup is unreadable forever — no support team can recover it, including Meta's.
Where the key lives on Android
- 01Open WhatsApp.
- 02Settings → Chats → Chat backup.
- 03Tap End-to-end encrypted backup.
- 04If you previously chose the 64-digit key path (not a passphrase), tap Manage → Show your password / key.
- 05WhatsApp asks for biometric or device unlock, then shows the 64-character hex string.
It only shows ONCE
If you chose 'Use end-to-end encrypted backup' originally and selected the 64-digit key option, WhatsApp lets you re-display it via Manage. If you chose the passphrase route (a memorable password), you'll never see the underlying 64-digit form; only your passphrase unlocks the backup.
Where to save the key
- A password manager (1Password, Bitwarden) under a Secure Note titled 'WhatsApp 64-digit key — Phone XYZ'.
- A printed sheet inside a fireproof box, a sealed envelope at home, or a bank safe deposit box.
- NEVER in plain WhatsApp / iMessage / Telegram messages to yourself; those go through accounts you might lose access to.
- NEVER in a screenshot uploaded to iCloud Photos without a key-only album, because losing your iCloud account means losing this too.
What happens if you lose the key
The Crypt15 file becomes mathematically unreadable. Meta's design is deliberate: the key never reaches WhatsApp's servers. Even WhatsApp engineers cannot recover your backup. The only paths back are: (1) restore from a non-E2EE older Google Drive backup if one exists, (2) reset E2EE backup on the phone (which discards the old key and starts fresh).
If you chose a passphrase instead
WhatsApp lets you pick a passphrase rather than a 64-digit key. Chat Hoarding for Mac decrypts the 64-digit hex key path only — passphrase and passkey backups are not yet supported. If you originally chose a passphrase, switch the phone to the 64-digit key mode (WhatsApp → Chat backup → End-to-end encrypted backup → Change → 64-digit encryption key), save the new key, then take a fresh backup. The new Crypt15 file will be decryptable by Chat Hoarding for Mac.
How to verify the key is correct without decrypting on the phone
Hand the key + the Crypt15 file to Chat Hoarding for Mac. AES-GCM's authentication tag fails immediately on a wrong key, so a 'wrong key' result happens within milliseconds. Garbled output never happens; either the key is right and decryption succeeds, or the auth tag fails and the app says so cleanly.
FAQ
Is the key the same for WhatsApp Business?
No. WhatsApp and WhatsApp Business have separate accounts, separate backups, and separate keys. If you run both on the same phone, store both keys.
Does the key change if I rotate my phone?
No, the key is tied to the WhatsApp account and the end-to-end encryption setup, not the device. Reinstalling WhatsApp on a new phone with the same account still uses the same key, until you reset the E2EE backup.