QR Code Generator
Free, in your browser, no data uploaded.
Why use it
Generate QR codes in seconds
No server involved
The QR code is generated entirely in your browser. No data leaves your device.
International standard
Compliant with ISO/IEC 18004. Compatible with any QR reader worldwide.
Error correction
Up to 30% of the code can be damaged and still be readable with level H.
Instant download
High-resolution PNG ready to print or use digitally in one click.
How it works
Three steps, no hassle
Enter your text or URL
Type or paste the content you want to encode: a URL, plain text, an address, or contact data.
Customize your QR code
Choose size, error correction level, and colors to match your needs.
Download the image
Download your QR code as a high-resolution PNG ready to print or use digitally.
FAQ
Got questions?
QR stands for Quick Response. It's a two-dimensional barcode invented in 1994 by Masahiro Hara at Denso Wave to track automotive parts. Today it's used to share URLs, contact data, Wi-Fi credentials, and more with just a camera scan.
QR codes can encode URLs, plain text, vCard contact cards, Wi-Fi credentials, GPS coordinates, phone numbers, email addresses, and even binary data. Maximum capacity depends on data type and error correction level chosen.
A QR code can store up to 4,296 alphanumeric characters, 7,089 numeric digits, or 2,953 bytes of binary data at maximum version (version 40). For short URLs, version 1 (21x21 modules) is sufficient.
Error correction levels are L (7%), M (15%), Q (25%), and H (30%). They indicate how much of the code can be damaged or obscured and still be readable. Use H for industrial applications or when adding a logo overlay. L or M is fine for clean web or print use.
You can change module (dot) color and background, output size, and error correction level. To add a center logo, use level H and ensure the logo doesn't cover more than 30% of the total area.
QR codes: history, uses, and how to generate them correctly
The QR code was invented in 1994 by Japanese engineer Masahiro Hara while working at Denso Wave, a Toyota subsidiary. The original goal was to track automotive components during manufacturing with greater speed than traditional barcodes. Hara designed the distinctive square pattern — including the three positioning squares in the corners — so the code could be read from any angle at high speed.
The QR standard is defined by ISO/IEC 18004 and is royalty-free, which drove its mass adoption. Today QR codes are fundamental in mobile payments (WeChat Pay, PayPal, Venmo), physical marketing, digital restaurant menus, two-factor authentication, and logistics. The COVID-19 pandemic in 2020 was a massive catalyst: physical menus were replaced by QR codes worldwide.
Convertir.ai generates QR codes directly in your browser using the qrcode.js library, without sending any data to external servers. This is especially important when content is sensitive, such as Wi-Fi passwords, private contact data, or internal URLs. Local generation guarantees complete privacy and instant speed.