Java Certificate Conversion

Convert certificates between JKS, PKCS#12, and PEM formats. Step-by-step keytool and OpenSSL commands.

Interactive Demo

Java keystores (JKS/PKCS12) and PEM files serve different ecosystems. Use keytool for Java formats and OpenSSL for PEM conversions.

JKS

Java KeyStore

keytool

PKCS12

.p12 / .pfx

openssl

PEM

.pem / .crt / .key

PKCS12 is the universal format - convert through it when crossing ecosystems

Step 0 of 2

2 steps required

Click "Show Commands" to see the conversion steps

JKS ↔ PKCS12 conversions

Java's built-in certificate tool

PKCS12 ↔ PEM conversions

Universal crypto toolkit