SSL/TLS

Coding tips and build notes by Mahir Faysal, a student web developer in Bangladesh: tested Python, HTML, CSS, JavaScript and PHP tutorials, plus notes from my Next.js and Gemini projects. Sample posts are marked and drafts stay in the admin area.

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Coding tips

How to Check an SSL Certificate Expiry Date (Browser, OpenSSL, PowerShell, curl and Python)

To check an SSL certificate expiry date, click the padlock or site-information icon in your browser and read the Expires on date, or pipe openssl s_client into openssl x509 -noout -enddate. On Windows, PowerShell reads the NotAfter date, and -checkend warns you before it lapses.

October 28, 2026 · 13 min read · 2 views

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