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TLS cert validity is weeks. Online checkers send your PEM to their server. The X.509 Inspector runs in your browser — paste PEM or DER, or fetch from a domain. Flags expiry, weak keys, SHA-1 sigs, and chain breaks. Zero uploads. Try it here: capytoolkit.com/tools/securi... #devops #certificates

capytoolkit.comX.509 Certificate Inspector — Inspect PEM & DER Certificates | CapyToolkit | CapyToolkitInspect X.509 certificates and certificate chains client-side. View SANs, expiry, key algorithm, chain depth, and security flags. No upload — all in your browser.

8BitAlex

@8bitalex.bsky.social

5 June

the in-browser approach is smart. most devs probably don't realize how much traffic cert checkers see just from copy-paste workflows.

CapyToolkit

@capytoolkit.com

I'm glad you like the idea. It's also worth mentioning that in my tool results are instant while on the popular website I had to wait around 2 minutes for results.

5/6/26, 9:11 pm0 reposts1 like

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