Tools

Web Tool How-To Guides — Devryo

In-depth guides for the tools developers reach for every day. QR codes, CSS and JS minification, Unix timestamps — explained with real use cases and zero filler. Every guide is paired with a free Devryo tool so you can follow along directly in your browser.

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How to Create a QR Code for Free: Use Cases, Best Practices, and Pitfalls

A practical guide to generating QR codes. Covers linking to URLs, business cards, menus, and events — plus error correction levels, minimum print sizes, and whether to use short URLs.

2026-03-19Read more →

Start with the most useful tools

The QR code guide is a good starting point — QR codes come up more often than you'd expect, and the Devryo generator lets you try everything instantly.