QR Code Generator
Generate downloadable PNG and SVG QR codes for URLs, Wi-Fi credentials, contacts, and text locally.
QR Code Generator
Generate downloadable PNG & SVG QR codes for URLs, Wi-Fi credentials, and contacts.
Educational Purpose Disclaimer
This calculator is provided for informational and educational estimation purposes only. All calculations and projections are based on standard mathematical formulas and assumed inputs. The output values should not be considered professional financial, legal, tax, or medical advice. ProCalc is not a registered financial advisor or licensed practitioner. Always consult a qualified professional (such as a Chartered Accountant, certified planner, or physician) before making major decisions.
What is the QR Code Generator?
The QR Code Generator is a fast, 100% private in-browser generator for Quick Response (QR) codes.
QR codes are 2D matrix barcodes scanned by smartphones to quickly open URLs, connect to Wi-Fi networks without typing passwords, load vCard contact cards, or display plain text.
Key Features
- Multiple Data Types:
- URL / Website Link: Direct smartphone camera to any web address.
- Wi-Fi Credentials: Auto-connect phones to Wi-Fi (SSID, Password, WPA2/WPA3).
- vCard Contact: Scan to add contact details (Name, Phone, Email) directly to phone address book.
- Plain Text: Encode arbitrary text or notes.
- High Resolution Downloads: Download as high-DPI PNG or vector SVG format.
- Customizable Colors: Customize foreground and background colors.
- 100% Private: QR code matrix rendering is computed locally in HTML5 Canvas / SVG without external API calls.
How Does the QR Code Generator Work?
1. Select Type: URL, Wi-Fi, vCard, or Plain Text.
2. Fill Details: Enter website link or Wi-Fi network details.
3. Customize Appearance: Pick foreground/background colors.
4. Download: Click Download PNG or Download SVG.
Formula & Calculation Method
QR Error Correction & Matrix Encoding:
Uses Reed-Solomon error correction to allow QR codes to remain readable even if partially damaged or obscured (up to 15-30% error recovery).
Example Calculation
Wi-Fi Input: SSID: "OfficeGuest", Pass: "SecureKey2026", Encryption: WPA
- Encoded String: `WIFI:S:OfficeGuest;T:WPA;P:SecureKey2026;;`
- Output: Downloadable QR matrix image ready for printing.
Frequently Asked Questions
**QR Error Correction & Matrix Encoding:** Uses Reed-Solomon error correction to allow QR codes to remain readable even if partially damaged or obscured (up to 15-30% error recovery).
Disclaimer: This tool is provided for informational and calculation purposes. Output values are estimates based on standard user inputs.