QR Code Types Explained: URL, vCard, Wi-Fi, Email, SMS, PDF, and More — When to Use Each
A practical guide to every QR code type available in QR2GO — what data each one encodes, how scanning devices handle it, and which type fits your specific use case.
Not All QR Codes Are the Same
Most people think of a QR code as "a square that opens a website." In reality, QR codes can encode many types of structured data, and the type you choose determines what happens when someone scans the code. A URL code opens a browser. A vCard code adds a contact. A Wi-Fi code joins a network — all automatically, with no typing required.
Choosing the right type is the first decision you make in QR2GO, and it is the most important one. This guide explains every available type, how each one works, and when you should use it.
URL QR Codes
What It Does
A URL QR code encodes a web address. When scanned, the device's default browser opens and navigates to that URL.
Data Format
The code simply contains the full URL, including the protocol:
https://www.example.com/landing-page
When to Use It
- Websites and landing pages — drive traffic from print materials to any online destination
- Social media profiles — link to your Instagram, LinkedIn, or Twitter profile
- Online menus — restaurants, cafes, and food trucks
- App download links — point to an App Store or Google Play page
- UTM-tracked campaigns — append UTM parameters to measure offline-to-online conversions
Best Practices
- Always use HTTPS — QR2GO warns you if the URL is not secure.
- Keep URLs as short as possible — shorter URLs produce less dense QR patterns that are easier to scan.
- Test the destination on a mobile device before generating the code.
- For long URLs with tracking parameters, consider using a redirect or link shortener first.
Suggested Internal Links
vCard QR Codes
What It Does
A vCard QR code encodes a contact card in the vCard format. When scanned, the phone prompts the user to save the contact directly to their address book — complete with name, phone number, email, company, job title, and even a website.
Data Encoded
| Field | Example |
|---|---|
| First name | Maria |
| Last name | Müller |
| Phone | +49 170 1234567 |
| maria@example.com | |
| Company | Acme GmbH |
| Job title | Marketing Director |
| Website | https://acme.example.com |
| Address | Hauptstraße 1, 10115 Berlin, Germany |
When to Use It
- Business cards — the most common vCard use case. Print the QR code on the back of the card so recipients can save your details with one scan.
- Conference badges — make networking easier at trade shows and events.
- Email signatures — include a small QR code image that links to your contact card.
- Company directories — display employee contact codes in office lobbies.
Best Practices
- Include the country code with phone numbers (+49, +1, +33, etc.) for international compatibility.
- Fill in as many fields as relevant — a complete vCard is more useful than one with just a name and phone number.
- Test the generated vCard by scanning and checking every field in the saved contact.
Wi-Fi QR Codes
What It Does
A Wi-Fi QR code encodes network credentials. When scanned, the phone automatically connects to the specified Wi-Fi network — no manual typing of the password required.
Data Encoded
| Field | Description |
|---|---|
| SSID | The network name (e.g., "Cafe_Guest") |
| Password | The network password |
| Encryption | WPA/WPA2, WPA3, WEP, or None |
| Hidden | Whether the network is hidden |
When to Use It
- Hospitality — hotels, cafes, restaurants, and co-working spaces can print the code on table tents, reception desks, or room cards.
- Office guest access — provide visitors with Wi-Fi access without sharing the password verbally.
- Home networks — stick a code near the router so family and guests can connect instantly.
- Events — display the code on screens or handouts at conferences and workshops.
Best Practices
- Use WPA2 or WPA3 encryption — never share open or WEP-encrypted networks via QR code.
- Update the QR code whenever you change the Wi-Fi password.
- For security-sensitive environments, rotate the guest password periodically and regenerate the code.
- QR2GO processes Wi-Fi credentials entirely in the browser — the password is never transmitted to any server.
Privacy Note
Because QR2GO generates everything client-side, your Wi-Fi password never leaves your device. This makes it one of the safest ways to share network credentials.
Email QR Codes
What It Does
An email QR code pre-fills an email in the user's default mail app. You can set the recipient address, subject line, and body text in advance.
Data Encoded
| Field | Example |
|---|---|
| Recipient | support@example.com |
| Subject | Question about my order |
| Body | Hello, I have a question about order #12345... |
When to Use It
- Customer support — place the code on packaging or receipts so customers can reach you with one scan.
- Feedback collection — pre-fill a subject line like "Feedback from [Event Name]" to make it easy for attendees.
- RSVP requests — let invitees reply to an event invitation by scanning and sending a pre-drafted email.
- Sales inquiries — lower the friction for potential customers to get in touch.
Best Practices
- Keep the pre-filled body text short — users can edit it before sending.
- Use a clear subject line so incoming emails are easy to sort and triage.
- Test with multiple mail apps (Gmail, Outlook, Apple Mail) to ensure compatibility.
SMS QR Codes
What It Does
An SMS QR code opens the phone's messaging app with a pre-filled phone number and optionally a pre-written message.
Data Encoded
| Field | Example |
|---|---|
| Phone number | +49 170 1234567 |
| Message | JOIN VIP to get 10% off your next order |
When to Use It
- Opt-in campaigns — let customers subscribe to SMS marketing with one scan.
- Two-factor authentication (2FA) — guide users to send a verification code.
- Voting or polling — "Scan to text your vote" at events or on TV shows.
- Quick contact — allow customers to text you directly from a flyer or product label.
Best Practices
- Include the country code in the phone number.
- Keep the pre-filled message under 160 characters to stay within a single SMS segment.
- Clearly label the QR code with a call-to-action like "Scan to send SMS."
Phone Call QR Codes
What It Does
A phone call QR code encodes a telephone number. When scanned, the phone displays a prompt to call the number directly.
When to Use It
- Customer service — print on packaging, manuals, or warranty cards.
- Emergency contacts — display on safety equipment or medical devices.
- Appointment booking — "Scan to call and book your appointment."
- Local businesses — include on flyers, door signs, and window stickers.
Best Practices
- Always include the full international format (+country code).
- Test the number on a real phone to make sure the call goes through.
- Pair with a clear label: "Scan to call us."
Plain Text QR Codes
What It Does
A plain text QR code displays a short text message on the user's screen. It does not open a browser, a contacts app, or any other application — it simply shows the text.
When to Use It
- Coupons and discount codes — display a promo code like "SAVE20" that the user can enter at checkout.
- Serial numbers or reference IDs — print on products or documents for easy lookup.
- Instructions — short assembly or usage instructions on a product label.
- Scavenger hunts — reveal clues or messages as part of a game.
Best Practices
- Keep the text short — more characters mean a denser, harder-to-scan code.
- Under 300 characters is ideal; below 100 characters is optimal.
- For longer content, use a URL code that links to a web page instead.
PDF QR Codes
What It Does
A PDF QR code links to a downloadable or viewable PDF file. When scanned, the browser opens the PDF so the user can read, save, or share it.
When to Use It
- Product manuals — replace printed instruction booklets with a QR code on the packaging.
- Restaurant wine lists — offer detailed tasting notes without cluttering the menu.
- Real estate listings — link to a full property brochure from a "For Sale" sign.
- Event programs — provide the full conference schedule as a downloadable PDF.
- Legal documents — terms and conditions, warranty certificates, or compliance documents.
Best Practices
- Host the PDF on a fast, reliable server with HTTPS.
- Optimize the PDF file size — large files take too long to load on mobile networks.
- Ensure the PDF is mobile-friendly (readable without zooming on a phone screen).
- Consider using a dynamic QR code so you can update the PDF without reprinting the code.
Type Comparison Table
| Type | Opens | Requires Internet | Editable After Print | Best For |
|---|---|---|---|---|
| URL | Browser | Yes | Only with dynamic code | Websites, landing pages, campaigns |
| vCard | Contacts app | No | No | Business cards, networking |
| Wi-Fi | Wi-Fi settings | No | No | Guest networks, hospitality |
| Mail app | No (opens draft) | No | Support, feedback, RSVPs | |
| SMS | Messages app | No (opens draft) | No | Opt-ins, quick contact |
| Phone | Phone dialer | No | No | Customer service, bookings |
| Plain Text | On-screen display | No | No | Coupons, serial numbers, clues |
| Browser / PDF viewer | Yes | Only with dynamic code | Manuals, menus, brochures |
How to Choose the Right Type
Ask yourself these three questions:
-
What action should happen when someone scans the code?
- Visit a website → URL
- Save a contact → vCard
- Connect to Wi-Fi → Wi-Fi
- Send a message → Email or SMS
- Make a call → Phone
- Read a document → PDF
- See a code or message → Plain Text
-
Does the destination need an internet connection?
- If not, vCard, Wi-Fi, Email, SMS, Phone, and Plain Text all work offline.
- If yes, URL and PDF require the user to be online.
-
Might the content change after printing?
- If yes, use a URL or PDF type with a dynamic QR code so you can update the destination later.
Conclusion
Every QR code type solves a specific problem. URL codes drive web traffic. vCards simplify networking. Wi-Fi codes eliminate password friction. Email and SMS codes lower communication barriers. Phone codes enable instant calling. Plain text codes deliver quick messages. PDF codes replace printed documents.
Pick the type that matches your goal, fill in the data, and let QR2GO handle the rest. All QR code types are available on both Free and Premium plans.
Try them all at QR2GO — your QR code is ready in seconds.