Supports JKS, PKCS #12, and JCEKS; easily imports/exports certificates. 3. 8gwifi.org JKS Viewer (Online Tool)

Portecle is another lightweight, open-source GUI application for managing various keystore types.

Available on the Official Website , GitHub , and SourceForge . 2. Portecle

If you don't want to install software, you can use the 8gwifi.org JKS Viewer . Download - KeyStore Explorer

KeyStore Explorer is the most popular free, open-source replacement for the standard Java command-line tools. It provides an intuitive interface for managing keys and certificates without memorizing complex commands.

Create, load, and convert between JKS, PKCS#12, JCEKS, and BKS formats.

Windows, macOS, and Linux users who want a professional-grade interface.