Free tool
Bundle a PFX / PKCS#12.
Drop your certificate, private key, and optional CA chain. We encode a password-protected .pfx locally in your browser. Nothing leaves this tab.
100% in-browser — no upload, no server-side key handling
Starts with -----BEGIN CERTIFICATE-----
Starts with -----BEGIN PRIVATE KEY----- (or RSA / EC variant)
One or more intermediate / root certs, concatenated