Fix Wi-Fi QR Code Not Working — Common Errors & Solutions
Security mismatches, hidden SSIDs, special characters, 2.4/5 GHz, iOS/Android quirks — all the fixes in one checklist.
Read guide →QRBuilder Blog
Quick, practical guides for Wi-Fi, business cards, Maps, WhatsApp/SMS, PDFs, printing size, colors, logos, UTM tracking, and more.
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How to Make a QR Code for a PDF (Fast & Lightweight)
Host, compress, and link your PDFs so they open instantly on mobile — menus, manuals, tickets, brochures.
Read guide →Create a Google Maps QR Code — Directions in One Scan
Turn a Maps share link into a QR for storefronts, events, and parking — plus print size tips.
Read guide →Core Tutorials
How to Create a QR Code (Free & Fast)
Make QR codes for links, text, Wi-Fi, or vCard — fully in your browser, no watermark.
Read guide →QR Codes for Business Cards — Add a vCard QR
Share your contact with one scan. PNG vs SVG, size, and placement tips.
Read guide →Best QR Code Size for Printing — DPI & Placement
Exactly how big to print for cards, flyers, posters, and billboards. DPI rules included.
Read guide →Wi-Fi QR Codes — Connect Without Typing
Auto-join codes for homes, cafés, and offices. Supports WPA/WPA2, WEP, hidden SSIDs.
Read guide →Messaging & Social
WhatsApp QR Codes — Let Customers Message You Instantly
Create wa.me links with prefilled text and turn them into QR codes for chat-first support.
Read guide →Telegram QR Codes — Share Channels, Groups & Bots
Link users into your community or bot with a single scan — perfect for posters and packaging.
Read guide →QR Code for SMS — Send Texts with One Scan
Open the SMS app with a prefilled message — perfect for feedback and quick support.
Read guide →Track Your QR Codes with UTM Parameters
Measure scans in GA4 — campaign/source/medium best practices.
Read guide →Design & Print
Best Colors for QR Codes — Contrast Rules That Scan
High-contrast palettes, gradients that still scan, and quiet-zone rules.
Read guide →Add a Logo Inside Your QR Code — Tips That Still Scan
Error correction, overlay size, and background boxes for complex logos.
Read guide →QR Codes for Events & Tickets — Check-in, Maps & Schedules
Tickets, venue maps, agendas, and Wi-Fi — all via QR on badges and posters.
Read guide →QR Codes for Restaurant Menus — Best Practices
Link PDFs or menu pages, print sizes for tables and entrances, and common pitfalls.
Read guide →Concepts
Dynamic vs Static QR Codes — What’s the Difference?
When you need changeable links/analytics vs. fast, private, permanent QR codes.
Read guide →More Pages
QR on Business Cards — PNG vs SVG
Another angle on business card QR and format choice.
Open →QR Size — Quick Reference
Fast cheat-sheet for minimum sizes and scan distance.
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