⬛ QR Code Generator
Generate QR codes for URLs, text, phone, email, SMS, Wi-Fi, contacts and UPI payments — free, instant, browser-only.
What is QR Code Generator?
QR (Quick Response) codes are two-dimensional barcodes that encode data readable by any modern smartphone camera. Originally developed by Denso Wave in 1994, they became ubiquitous for linking physical objects to digital content. A single QR code can encode a website URL, Wi-Fi credentials, contact card, payment address, or any text up to several thousand characters.
ToolsNovaHub's QR Generator creates codes entirely within your browser using JavaScript. No data is uploaded to any server — your Wi-Fi passwords, UPI IDs, and contact details remain completely private. Eight content types are supported: URL/Link, plain Text, Phone number (tel:), Email (mailto: with subject and body), SMS, Wi-Fi credentials (WIFI: format for automatic network joining), vCard 3.0 contact, and UPI payment URI for Indian payment apps.
How to Use It?
Select a content type from the eight buttons at the top. Fill in the fields for your chosen type. Select size (128px to 512px) and error correction level. Click ⬛ Generate QR. The QR code appears instantly. Click ↓ Download PNG to save it. Use higher error correction (H) for printed materials that may get worn or dirty.
💡 Real-World Example
Example: A café owner wants customers to join their WiFi without typing a long password. Using the Wi-Fi QR type with their network name and password generates a code to print and place on tables — customers simply scan with their phone camera to connect instantly.
🔄 Static vs Dynamic QR Codes
| Static QR (this tool) | Dynamic QR |
|---|
| Content | Encoded directly — permanent | Encodes a short redirect URL you control |
| Can the destination change later? | ❌ No — requires generating a new code | ✅ Yes — update the redirect anytime, code stays the same |
| Scan analytics (views, location, device) | ❌ Not possible | ✅ Provided by the dynamic QR service |
| Cost | Free forever | Often free initially, may require subscription for analytics/longevity |
| Best for | Wi-Fi passwords, contact cards, one-time print materials, permanent links | Marketing campaigns needing tracking, or print materials where the link might change |
This tool generates static QR codes — the data is encoded directly into the pattern and never expires or requires a server. For a printed restaurant menu, business card, or Wi-Fi sign, static is usually ideal since the information rarely changes. If you need to track scan counts or update the destination URL after printing, you'd need a dynamic QR SERVICE (third-party, typically paid) that redirects through their server — this tool does not provide that.
✅ QR Error Correction Levels Explained
Every QR code includes built-in redundancy using Reed-Solomon error correction — allowing the code to remain scannable even if part of it is damaged, dirty, or covered (e.g. by a logo).
L (Low) — ~7%
Maximum data capacity, smallest/least dense pattern. Best for screens or pristine printed conditions with no logo.
M (Medium) — ~15%
The default balance — good for most general-purpose codes (URLs, contact info) on clean printed materials.
Q (Quartile) — ~25%
Good for codes that may get slightly dirty/worn — outdoor signage, product packaging, ID badges.
H (High) — ~30%
Maximum redundancy — required when adding a logo overlay (this tool auto-selects H when you upload a logo) since the logo covers part of the code's data area.
Higher error correction means a visually denser code for the same data — this is why a code with a logo at level H looks "busier" than the same data at level L. Always TEST scan any code with a logo on multiple devices before printing in bulk.
💼 QR Marketing Uses
🍔
Restaurant menus & Wi-Fi
Print a Wi-Fi QR (this tool's Wi-Fi type) on table cards — customers join instantly without asking staff for the password.
📧
Email & review requests
An Email-type QR on a receipt or packaging insert can pre-fill a "leave us feedback" email with subject line already set.
🌐
Social media growth
A Social Profile QR on business cards, packaging, or event banners makes following your Instagram/LinkedIn a single scan away — no typing usernames.
👤
Networking events
A vCard QR on your name badge lets people save your full contact details (name, phone, email, company) by scanning — far faster than manual entry.
💰
Contactless payments (India)
UPI QR codes at shop counters let customers pay via any UPI app (GPay, PhonePe, Paytm) — leave the amount blank for a reusable "pay any amount" code.
🎨
Branded codes
Use Custom Colors matching your brand palette and a small Logo Overlay (with H error correction) to make codes feel on-brand without sacrificing scannability.
📊 Understanding Your Results
QR Code image
A scannable square pattern encoding your data. Larger sizes (400–512px) are better for print; smaller (128–256px) for screens/digital sharing.
Error Correction Level
L (7%), M (15%), Q (25%), H (30%) — the percentage of the code that can be damaged/obscured and still scan successfully. Higher levels make denser-looking codes.
Data preview text
Shows the raw encoded string — useful for verifying a Wi-Fi password or UPI ID was entered correctly before printing/sharing.
Download PNG
Saves a transparent/white-background PNG at the exact pixel size selected — suitable for both digital use and print (300 DPI print needs ~ 512px for a 1.7-inch code).
⚠️ Common Errors & What They Mean
❌ "Please fill in the required fields"
The selected type (e.g. Email, Wi-Fi) needs at least the primary field filled — an empty email/phone/SSID can't generate a meaningful code.
⚠️ Wi-Fi QR doesn't connect on iPhone
Older iOS versions (pre-iOS 11) don't support Wi-Fi QR auto-join. Also double-check the security type (WPA/WPA2 vs WEP vs Open) matches your actual router setting.
📱 Code scans but shows garbled text
This can happen with very long text + Low error correction at a small size. Increase the size to 400px+ or raise error correction to Q/H for dense data.
💡 Advanced Tips
🖨️
Printing on small items
Use error correction level H for small printed codes (business cards, stickers) — this tolerates minor smudging, folding or print-quality issues.
📱
UPI codes for India
Leave the Amount field blank to create a reusable "pay any amount" code for a shop counter, or fill it in for a fixed-price item/donation.
🔗
Shorten long URLs first
Very long URLs create visually dense QR codes that are harder to scan from a distance. Consider a URL shortener before generating, especially for posters.
👤
vCard for networking
Generate a Contact (vCard) QR for your business card — recipients can scan to instantly save your name, phone, email and company to their contacts app.
📜 QR Code Type Comparison
| Type | Best Use Case | Scanning Result |
|---|
| URL | Posters, menus, packaging | Opens a webpage |
| Wi-Fi | Cafes, guest networks | Auto-joins the network (iOS 11+/Android 10+) |
| vCard (Contact) | Business cards, event badges | Prompts to save contact |
| UPI | Shop payments, donations (India) | Opens payment app with details pre-filled |
| WiFi vs Text | Text = plain info display; WiFi = action | Text just shows the string; WiFi performs an action |
FAQ
Are QR codes stored on your servers? +
No. Generation happens entirely in your browser via JavaScript. No data including WiFi passwords, UPI IDs, or contacts is ever transmitted to our servers.
✍️ Author: ToolsNovaHub Editorial Team
•
✅ Reviewed by: ToolsNovaHub Security & Network Team
•
📅 Last Updated: 12 June 2026
What is error correction? +
Error correction lets a QR code be scanned even if part is damaged. Level L: 7% recovery, M: 15%, Q: 25%, H: 30%. Use H for physical print materials.
How do I scan a Wi-Fi QR code? +
iOS 11+: open Camera and point at the code. Android 10+: Settings > Wi-Fi > Add Network > Scan QR. Some older phones need a dedicated QR scanner app.
What is the maximum data capacity? +
At level L: up to 7,089 numeric characters or 4,296 alphanumeric characters. Shorter data produces simpler, easier-to-scan codes. Use a URL shortener before encoding long URLs.
Can I add a logo to the QR code? +
Logo overlay is not available in this version. If you plan to add a logo in an image editor, use Highest (H) error correction to compensate for the obscured centre area.