The QR Code Encyclopedia

8 seasons · 64 episodes · Free · See every episode▶ Start with episode 01Scroll to walk in ↓

Every episode

Season 1

The basics

  1. 01What Is a QR Code? How QR Codes Actually Work, Explained2:40
  2. 02Static vs Dynamic QR Codes: Can You Change a QR Code After Printing?2:08
  3. 03Why Damaged QR Codes Still Scan: Error Correction Levels Explained2:06
  4. 04QR Code Not Scanning? Check the Quiet Zone (Explained)2:16
  5. 05QR Code Minimum Size: How Small Can a QR Code Be? (The 10:1 Rule)2:07
  6. 06WiFi QR Code Explained: How It Works and Why It Won't Connect2:16
  7. 07What Is Quishing? QR Code Scams and How to Spot a Fake QR Code2:23
  8. 08Data Matrix vs QR Code: The Other 2D Barcode, Explained2:26
Season 2

Design to tracking

  1. 09QR Code Colors: Which Colors Scan (and Which Fail)2:18
  2. 10QR Code With Logo: How to Add One Without Breaking It2:28
  3. 11How to Print a QR Code So It Actually Scans2:18
  4. 12QR Code Payments Explained: UPI, Bharat QR and EMV QR2:52
  5. 13vCard vs MeCard: Contact QR Codes Explained2:17
  6. 14Micro QR Code and rMQR: The Tiny Cousins of the QR Code2:38
  7. 15QR Code Tracking: Scan Analytics and UTM Parameters Explained2:30
  8. 16GS1 Sunrise 2027: The Barcode Is Getting a QR Code2:13
Season 3

Scanning to real uses

  1. 17How to Scan a QR Code on iPhone and Android (No App Needed)2:11
  2. 18Who Invented the QR Code? The Story Behind It (1994)2:19
  3. 19How Much Data Can a QR Code Hold? Versions, Modes and Limits2:21
  4. 20Types of Barcodes Explained: EAN-13, Code 128, Code 39, ITF-142:29
  5. 21PDF417 and Aztec Codes: The Barcodes on Your Boarding Pass2:18
  6. 22QR Code Menus Done Right: PDF vs Web Page, Size and Placement2:09
  7. 23One QR Code for App Store and Google Play: Smart Links Explained2:10
  8. 24Google Review QR Code, Phone, SMS and Email QR Codes Explained2:06
Season 4 · Coming soon

Paying with QR codes around the world

  1. 25Pix: how Brazil pays with a QR codeSoon
  2. 26PromptPay, PayNow and DuitNow: Southeast Asia's payment QR codesSoon
  3. 27QRIS and VietQR: one code for every bankSoon
  4. 28Alipay and WeChat Pay: the QR codes that made China cashlessSoon
  5. 29EPC QR code (GiroCode): bank transfers in EuropeSoon
  6. 30Swiss QR-bill: the bill with a QR code built inSoon
  7. 31Crypto QR codes: bitcoin and Ethereum payment linksSoon
  8. 32Event tickets: why the gate code changes and is used onceSoon
Season 5 · Coming soon

Under the hood, and new uses

  1. 33Alignment and timing patterns: the quiet helpersSoon
  2. 34Format and version information: the code's labelSoon
  3. 35Mask patterns: why every QR code looks randomSoon
  4. 36ECI and structured append: other languages and codes in piecesSoon
  5. 37NFC vs QR code: tap or scan?Soon
  6. 38QR codes on packaging, and the Digital Product PassportSoon
  7. 39AR QR codes: scan to open 3D and ARSoon
  8. 40The standards behind every code: ISO/IEC 18004, 16022, 24778, 15438 and JIS X 0510Soon
Season 6 · Coming soon

The rest of the code family

  1. 41iQR code: the QR code that can be rectangular and hugeSoon
  2. 42SQRC: the QR code with a hidden private sectionSoon
  3. 43Frame QR: a QR code with a window for a pictureSoon
  4. 44MaxiCode: the bullseye on UPS parcelsSoon
  5. 45Han Xin code: China's own 2D barcodeSoon
  6. 46DotCode: printed at high speed on cigarette packs and cansSoon
  7. 47UPC-A vs EAN-13: the two checkout barcodesSoon
  8. 48GTIN: the number behind every productSoon
Season 7 · Coming soon

QR codes by industry

  1. 49Restaurants and hotels: menus, rooms, reviews and paymentsSoon
  2. 50Real estate: signboards, brochures and property toursSoon
  3. 51Retail and packaging: shelf codes, product pages and recallsSoon
  4. 52Events and weddings: invites, tickets, check-in and photo sharingSoon
  5. 53Healthcare and pharma: medicine packs, patient forms and Data MatrixSoon
  6. 54Schools and colleges: attendance, notes and campus mapsSoon
  7. 55Logistics and warehouses: labels, pallets and trackingSoon
  8. 56Government and public services: bills, IDs, transport and tourismSoon
Season 8 · Coming soon

The QR marketing playbook

  1. 57QR code myths bustedSoon
  2. 58Where to put a QR code on posters, billboards and flyersSoon
  3. 59Call-to-action lines that get more scansSoon
  4. 60QR codes in TV, YouTube and video adsSoon
  5. 61QR codes for Instagram, WhatsApp and LinkedInSoon
  6. 62QR codes for PDFs, videos and file downloadsSoon
  7. 63A/B testing QR codes: compare two designs or placementsSoon
  8. 64Measuring QR campaign results: scans, visits and salesSoon

Sixty-four episodes on how a code works. The next one is yours.

Your picture becomes the code. Verified on real decoders under real-world conditions.

Make a code
An AriaQR art code that scans