How to open .P8 files on Android
To open .P8 files on Android, android is not a typical environment for handling private-key files directly; do not try random “file opener” apps—transfer the .p8 securely to the server or desktop tooling (for example OpenSSL) that will use or convert the key.
Step-by-step instructions
- Android is not a typical environment for handling private-key files directly; do not try random “file opener” apps—transfer the .p8 securely to the server or desktop tooling (for example OpenSSL) that will use or convert the key.
Common issues
The .p8 file opens as unreadable characters
Many PKCS #8 keys are stored as DER (binary) rather than PEM text, so a text editor shows garbage even though the file is valid.
- Check whether it contains PEM headers/footers; if not, assume it may be DER.
- Use OpenSSL’s PKCS#8 tooling (openssl-pkcs8) to read/convert between DER and PEM as needed.
OpenSSL reports it cannot read the key / wrong format
The file may be encrypted (EncryptedPrivateKeyInfo), may be in a different key container than you expect, or may be truncated/corrupted.
- Verify whether it is encrypted PKCS#8; if it is, you must provide the correct passphrase when reading/converting it.
- Re-download or re-export the key from the original source if the file may be incomplete or modified.
A service (for example APNs) rejects the .p8 key
Even if the file is a valid PKCS #8 key, the service may require a specific key that matches your account/project configuration, or your implementation may be using the wrong key.
- Confirm you are using the correct .p8 signing key issued for that service/workflow (for APNs, follow Apple’s token-based connection instructions).
- If you converted the key, ensure the conversion kept the correct key material and that your code/tool is loading the intended key file.
Security note
.p8 files typically contain private keys; treat them like passwords: do not email them, commit them to source control, or share them in tickets/chat logs.