QR code guides
Practical tutorials for getting the most out of QR codes
Static vs Dynamic QR Codes: What You Are Actually Choosing
The pattern either contains your address or a redirect someone else owns. What editable really costs, when dynamic is right, and the myths in between.
4 min readQR Codes and Barcodes in Microsoft Word, Without an Add-in
Word can draw QR codes and barcodes itself, one per mail-merge record. The hidden field codes, and the size and check-digit traps.
6 min read SafetyQR Code Scams, and How to Scan Safely
A QR code is only a link, so the risk is where it leads. Where fake codes turn up, what to check before opening one, and how to protect codes you print.
4 min read How-toHow to Scan a QR Code From a Screenshot or Photo
When the code is on your own screen, the camera cannot see it. Reading a QR code from a screenshot or saved photo on iPhone, Android and a computer.
3 min read EssentialsQR Codes in Other Languages and Emoji: What Changes
Any language and any emoji fit in a QR code, but not for the same space. Measured: why Cyrillic, Arabic and Chinese text makes denser codes.
5 min read PrintSVG or PNG for a QR Code? It Depends Where It Is Going
PNG for screens and quick sharing, SVG for print and anything styled. File sizes measured from real exports, and how many pixels a printed code needs.
4 min read ReferenceQR Code Capacity and Barcode Sizes: Reference Tables
How much fits in each QR code version at each error-correction level, the printed size that implies, and GS1 barcode sizes from 80% to 200%.
5 min read TroubleshootingWhy Your QR Code Won’t Scan — and How to Fix It
Six reasons a printed QR code fails: low contrast, cropped quiet zone, wrong size, inverted colours, too much data, decorative modules. With fixes.
3 min read BarcodesEAN-13 vs UPC-A vs Code 128: Which Barcode You Need
Selling in Europe, the US, or labelling internal stock? A plain decision guide to retail symbologies, with a comparison table and check-digit notes.
4 min read PrintHow Big Should a Printed QR Code Be?
The one-tenth rule of thumb, worked examples from business cards to posters, and why data density changes the answer.
4 min read EssentialsHow QR Codes Work — and Why Damaged Ones Still Scan
Finder patterns, versions and Reed–Solomon error correction in plain words: what the squares mean and how a code survives a logo or a torn corner.
4 min read RestaurantsQR code for a restaurant menu: what actually works
Print size for table tents, the white border that must not be cropped, matte versus gloss, and why static codes never expire.
5 min read BarcodesBarcodes for a small shop: which type, and how to print them
Do you need a GS1 number? Which symbology, what a check digit does, and the colour rule that makes red barcodes invisible to a till.
5 min read BulkFrom spreadsheet to printed labels, without a design tool
Which columns matter, why errors are caught before generating, and how to get the size right on paper.
4 min read EventsQR codes for an event, from invitation to the door
Tickets, check-in, WiFi and signage — and the offline failure nobody plans for.
3 min read BusinessA QR code that asks for a Google review
Getting a link that opens the review box rather than your listing, where to put it, and what Google prohibits.
4 min read BusinessA WhatsApp QR code that opens a chat, pre-typed
The number format that trips everyone up, and why pre-typing the first message matters.
4 min read For developersAdd a QR code generator to your site with one link
One anchor tag, no script, no account. Set the content, the theme and the logo from the URL.
3 min read WiFiHow to create a QR code for your WiFi network
What a WiFi code actually contains, the characters that break one, and why changing the password means reprinting.
4 min read vCardQR codes on business cards: what to encode and how big to print
What to put in the code, how big it can be at card size, where it goes, and which module shapes to test first.
4 min read