Free QR Code Generator

QR codes were invented in 1994 by Masahiro Hara and his team at Denso Wave, a subsidiary of Toyota, to track automotive parts during manufacturing. The 'QR' stands for 'Quick Response' — the team designed the code to be scanned significantly faster than traditional barcodes. Unlike standard barcodes that encode data in one dimension, QR codes store data in a two-dimensional grid pattern that holds up to 7,089 numeric characters or 4,296 alphanumeric characters. Denso Wave made the patent freely available, which drove global adoption across industries far beyond automotive manufacturing.

QR codes saw early adoption in Japan throughout the 2000s but struggled in Western markets until the COVID-19 pandemic in 2020 forced contactless interactions. Restaurants replaced physical menus with QR code links, and businesses adopted QR codes for contactless payments, check-ins, and digital vaccination records. Apple and Google building native QR scanning directly into their camera apps (iOS 11 in 2017, Android natively in 2018) removed the need for dedicated scanner apps and was the technical tipping point. By 2023, Statista reported that 89 million US smartphone users scanned a QR code — up from 72 million in 2019.

The most frequent mistakes are: linking to non-mobile-optimized pages (users scan with phones, so the destination must work on mobile), making the code too small for reliable scanning (minimum 2cm x 2cm for close-range, larger for distance), placing codes where there's no internet access or cell signal, not testing the code after generating it, and using low error correction on printed materials that may get damaged or dirty. Also, putting a QR code on a website is almost always pointless — the user is already on a device that can click a link.

QR codes include redundant data that allows them to be scanned even when partially damaged, dirty, or obscured. There are four levels: L (7% recovery — smallest code), M (15%), Q (25%), and H (30% recovery — largest code). Use L for digital-only codes displayed on screens. Use M or Q for printed materials that may get folded, stained, or weathered. Use H for codes that will be printed on uneven surfaces, outdoor signage, or anywhere physical damage is likely. Higher correction means a denser (larger) code, so balance recovery needs against scanning ease.

Download PNG for digital use — social media posts, emails, websites, and digital presentations. PNG is a raster format with a fixed resolution, so specify a large enough size for your intended display. Download SVG for print materials — business cards, posters, packaging, and signage. SVG is a vector format that scales to any size without quality loss, so your QR code stays crisp whether it's on a business card or a billboard.

The minimum practical size depends on scanning distance and the amount of encoded data. For close-range scanning (a business card held in hand), 2cm x 2cm (about 0.8 inches) works for short URLs. For scanning from 30cm away (a restaurant table tent), aim for at least 3–4cm. For scanning from 1 meter or more (posters, signage), the code should be at least 10cm. The general rule is that the scanning distance should be no more than 10x the code's width. Shorter URLs produce less dense codes that scan more reliably at smaller sizes.