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certstrap vs KeyStore Explorer: catalog facts
certstrap	KeyStore Explorer
Free Free and open source under the Apache 2.0 licence.	Free Free and open source with no paid tier.
Windows, Linux, Command line	Windows, macOS, Linux
Simpler than raw openssl commands Covers CA creation, CSRs and signing	Replaces keytool and jarsigner with dialogs Converts between many key and certificate formats
Command line only Aimed at basic private PKI rather than full certificate lifecycle management	Needs a Java runtime installed Focused on Java KeyStore workflows
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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