PEM Key Inspector
Inspect PEM-encoded keys locally in your browser. Identify key type, algorithm, format, key size and supported curve information without uploading private key material.
How to Use
Paste your PEM-encoded public key, private key, certificate, or OpenSSH key into the editor.
Review detected format specifications, algorithm names, modulus bit lengths, and elliptic curves.
Check the SHA-256 DER fingerprint to verify key identity against known infrastructure records.
Click Copy Summary to export the cryptographic metadata report.
Why Use PEM Key Inspector?
Zero-Upload Privacy Assurance
Cryptographic material never leaves your device. Private keys are never logged, stored, or sent over the internet.
Wide Format Recognition
Supports PKCS#1, PKCS#8, SubjectPublicKeyInfo, X.509 certificates, and single-line OpenSSH keys.
Algorithm & Curve Detection
Accurately determines RSA key sizes (2048, 3072, 4096-bit) and EC curves (P-256, P-384, P-521, secp256k1).
Encrypted Key Warning
Clearly alerts users when password-encrypted private key material is detected.
About This Tool
The PEM Key Inspector decodes and analyzes PEM-formatted cryptographic keys, certificates, and CSRs directly within client-side browser memory. It inspects ASN.1 structures and SPKI headers to identify key algorithms (RSA, ECDSA, Ed25519), bit lengths, elliptic curves, and SHA-256 fingerprints with zero server transmission.
Frequently Asked Questions
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