
How Do QR Codes Work? From Text to Scannable Pattern
How QR codes work: the encode, correct, place, mask pipeline, measured module anatomy, and a damage experiment where level H survived 200 blotches.
Deep dives into our tech stack, architectural decisions, and scaling challenges. Written by the folks who build the platform.
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How QR codes work: the encode, correct, place, mask pipeline, measured module anatomy, and a damage experiment where level H survived 200 blotches.

QR code vs barcode with measured tests: the same URL took 1,496 bytes as a QR versus 7,531 as a Code 128 barcode. Capacity, damage, and use-case picks.
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Do QR codes expire? The pattern never does: how static links rot, dynamic services die, and measured error-correction tradeoffs decide real-world lifespan.
An SSL certificate chain links your site to a trusted root via intermediates. Certs cap at 200 days and drop to 47 by 2029. Learn how to verify your chain.

What an SSL certificate does: enables TLS encryption, proves site identity. How certs work, what they contain, and why 90%+ of web traffic now runs HTTPS.

A redirect chain is a series of redirects between your URL and the final page. Nearly 1 in 12 sites has one. Learn how to find, fix, and prevent them.