Romero Melo operates QR Code Free and is the named author of its QR code guides. His design work focuses on making information clear in branded documents and visual production.
What this site covers
The site combines a static QR code generator with practical guidance about payloads, quiet zones, contrast and preparing files for print. Its current tool exports PNG and SVG for URLs or text, Wi-Fi credentials, contact records and email drafts.
How to interpret technical examples
Specifications, worked calculations and live tool observations are different kinds of evidence. A calculation illustrates geometry; it is not a promise that every phone will scan the result. An observation about one payload and correction setting does not establish a universal character-count table.
The guides link relevant primary references, including DENSO WAVE’s QR documentation and the applicable payload specifications. Use the exact source when checking a technical requirement, and test the final exported file on the intended material and devices.
Corrections and maintenance
To report an error, describe the article or tool setting, browser, device and reproducible steps. Use synthetic content instead of sending a password or private contact record. Corrections can be sent through the contact page or to contato@romeromelo.com.br.
For the site’s scope and data practices, read About QR Code Free and the privacy policy.