What is a .P12 file?
P12 bundles a private key with its certificate chain in one password-protected file.
- Did you know
- PKCS#12 is the cross-platform standard for moving a key and its certificates together.
- PKCS#12 is one of the Public-Key Cryptography Standards published by RSA Laboratories.
- The format grew out of Microsoft’s PFX, which RSA formalised as PKCS#12 while keeping binary compatibility.
- What Analyser reads
- Inspect security and crypto files: PEM private/public keys (RSA/EC/Ed25519, PKCS#1 vs PKCS#8, encryption), OpenSSH .pub with SHA-256 fingerprint, PuTTY .ppk, PKCS#10 CSR, X.509 CRL, PKCS#7 bundles, OpenVPN/WireGuard configs, Java KeyStores, Apple .mobileconfig/.mobileprovision, Windows .reg (with autorun flagging), and pcap/pcapng captures - warning when a private key or secret is present.
- Depth of analysis
- .P12 is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .P12 file
- Drag a .P12 file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.