2026年7月28日

Your PEM File Is a Black Box Until It Isn’t: A Field Guide to the X.509 Certificate Decoder

By xiezixing 2026年7月28日

Paste the PEM, see every field in one screen — validity badge, subject and issuer, public key, signature algorithm, SAN list, and a copy-paste-friendly SHA-256 fingerprint. All parsed locally in your browser.

未分类

Why Your Sensor Data Is Lying to You: A Field Guide to Clipping, Filtering, and Marking Out-of-Bounds Values

By xiezixing 2026年7月28日

The Bottom Line Out-of-bounds values are not the problem. They are the signal. The choice…

未分类

Why 10-10-10 Fertilizer Can Be 48% Filler

By xiezixing 2026年7月28日

The first time I checked a mathematically exact 100 kg batch of 10-10-10, the result…

未分类

Why the Signature You Built in Word Looks Wrong in Outlook: A Field Guide to Email Signature HTML That Survives Gmail, Outlook, and Apple Mail

By xiezixing 2026年7月28日

Why the Signature You Built in Word Looks Wrong in Outlook: A Field Guide to…