Open P12 files in your browser
The locked file that keeps a certificate with its private key, for signing, email, Wi-Fi or a server. See which certificate is inside before you install it. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your key file opens as what it holds: each key by its kind and size, and the certificates beside it.
- Each key's kind and size • Never the key itself
- Locked files • The password stays on your device
- Who it signs as • Its certificates and their chain
- SSH and PuTTY keys • With their fingerprints
About P12
PKCS #12 grew out of Microsoft's PFX, and RSA Laboratories published it in 1999. Windows, macOS, Java and Apple's developer tools save a certificate with its private key as .p12 or .pfx, almost always locked with a password.
Inside are bags of private keys and certificates, sometimes revocation lists and secrets, each with a friendly name. Newer files lock them with AES, and older ones with 3DES or RC2, which browsers' own cryptography lacks.
Filepeek asks for the password, keeps it on your device, and opens AES, 3DES and RC2 files alike. It shows each certificate with its names, dates and chain, and each private key only by its kind and size, with the certificate it belongs to.
PKCS #12 key store
.p12 • .pfx
Format
- MIME type
- application/x-pkcs12
- Made by
- RSA Laboratories
- Released
- 1999
Inside the file
- Holds
- Certificates and private keys
- Locked
- With a password
- Ciphers
- AES, 3DES or RC2
- Standard
- PKCS #12
Opens in every browser
Browsers download P12 and PFX files. Filepeek shows what one holds in Chrome, Edge, Firefox and Safari, without installing anything.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I see what's in a P12 or PFX?
Drop it on this page or press Peek a P12, then type its password. Its certificates and keys show at once, without installing anything.
Is it safe to type the password here?
The password and the file stay on your device. Filepeek uses the password only to open the file, and never shows a private key, only its kind and size.
Which certificate does the key belong to?
Filepeek matches each private key to the certificate with the same public key, and marks that one With its key.
Is my file uploaded?
No. The file opens inside your browser and never leaves your device.