What information can a QR code store?
QR codes encode text strings read by camera apps. Most common: URLs pointing to websites, menus, or registration forms.
Other payloads: plain text messages, Wi-Fi credentials (SSID, password, encryption type), email addresses (mailto:), phone numbers (tel:), and vCard contact cards.
Static QR codes embed data directly — they work forever without a subscription. Dynamic QR codes route through a vendor server that can change destination and track scans.
Choose payload type based on use case — URL for marketing, Wi-Fi for guest access, vCard for networking events.
Step-by-step: creating a QR code for a URL
Open QR Code Generator on freetoolkitapp. Select URL type. Paste your link including https://. Preview updates live.
Download PNG at 512px minimum for print; higher resolution for posters viewed from distance.
Test with three phones (iOS, Android mid-range, older Android) before printing 500 flyers.
Use URL Encoder / Decoder if your link contains query parameters with special characters — encode correctly before QR generation.
Wi-Fi QR codes — the most useful everyday use case
Instead of dictating a 16-character password to guests, print a Wi-Fi QR in the guest room or café counter.
Android scans natively in camera; iOS 11+ recognises Wi-Fi QR payloads. Enter SSID, password, and WPA/WPA2 security type in the generator.
Regenerate when you change router password — old QR codes still show old credentials embedded.
For office guest networks, use a separate SSID with limited bandwidth rather than sharing main LAN credentials.
QR codes for business cards and marketing
Add a small QR on business cards linking to LinkedIn or portfolio — keep quiet zone white border around code.
Restaurant menus: QR to PDF on Google Drive or your ordering site. Event posters: registration URL with UTM parameters for analytics on your site, not the QR vendor.
Error correction levels L/M/Q/H let code remain scannable with minor damage or logo overlay — H for outdoor posters, L for clean digital screens.
How to make QR codes scan reliably
Minimum print size about 2 cm × 2 cm for arm’s-length scanning; larger for billboards viewed from meters away.
High contrast: dark modules on white background. Inverted light-on-dark fails on some older scanners.
Quiet zone: preserve empty margin around code — cropping into artwork breaks reads.
Avoid glossy lamination glare; matte finish scans better under restaurant lighting.
Are QR codes private?
freetoolkitapp generates QR codes client-side — your URL or Wi-Fi password is not stored on our servers for static generation.
No tracking, expiry, or scan limits on static codes you download. Contrast with dynamic QR SaaS that monetises analytics.
Do not encode secrets you would not print in plain text — QR is encoding, not encryption.
Pair with Password Generator for creating strong Wi-Fi guest passwords before encoding them.
Frequently asked questions
Can QR codes expire? Static codes do not; dynamic vendor codes can if subscription lapses.
SVG or PNG for print? PNG at high resolution is simplest; SVG scales infinitely for large format.
Can I put a logo in the centre? Yes with high error correction (H) and sufficient size — test thoroughly.
Do QR codes work offline? Encoding works offline; scanning a URL QR requires internet when opened.