# ABCQR.com — Free QR Code Generator

> Free, private, instant QR code generator. 100% client-side — no backend, no tracking, no cookies.

ABCQR is a static web application that generates QR codes entirely in the browser using JavaScript. No data ever leaves the user's device. Built by [Color Vivo Internet](https://colorvivo.com).

## QR Code Types

ABCQR supports 10 types of QR codes:

### Link
Encodes a URL. The most common QR code type. When scanned, opens the URL in the device's browser.
- Input: URL (e.g., `https://example.com`)
- Format: Plain URL string

### Text
Encodes plain text. When scanned, displays the text on the device.
- Input: Any text string
- Format: Plain text

### Email
Creates a pre-filled email. When scanned, opens the device's email client with recipient, subject, and body pre-filled.
- Input: Email address, subject (optional), body (optional)
- Format: `mailto:address?subject=...&body=...`

### Phone
Encodes a phone number. When scanned, prompts the user to call the number.
- Input: Phone number with country code (e.g., `+34612345678`)
- Format: `tel:+34612345678`

### Event / Calendar
Creates a calendar event. When scanned, adds an event to the device's calendar app.
- Input: Event title, start date/time, end date/time, location (optional), description (optional)
- Format: vCalendar (VCALENDAR/VEVENT)

### WiFi
Encodes WiFi network credentials. When scanned, connects the device to the WiFi network automatically.
- Input: Network name (SSID), password, encryption type (WPA/WEP/None), hidden network flag
- Format: `WIFI:T:WPA;S:NetworkName;P:password;H:false;;`

### vCard (Contact)
Creates a digital contact card. When scanned, adds a contact to the device's address book.
- Input: Full name, phone, email, organization, job title, URL, address
- Format: vCard 3.0 (BEGIN:VCARD ... END:VCARD)

### Location
Encodes geographic coordinates. When scanned, opens a map application showing the location.
- Input: Location name, latitude, longitude
- Format: `geo:lat,lon?q=name`

### Social Media
Creates a link to a social media profile. Supports 8 platforms:
- Instagram: `https://instagram.com/username`
- TikTok: `https://tiktok.com/@username`
- X (Twitter): `https://x.com/username`
- LinkedIn: `https://linkedin.com/in/username`
- YouTube: `https://youtube.com/@username`
- Facebook: `https://facebook.com/username`
- GitHub: `https://github.com/username`
- Threads: `https://threads.net/@username`

### WhatsApp
Creates a WhatsApp chat link. When scanned, opens a WhatsApp conversation with the specified number and optional pre-filled message.
- Input: Phone number with country code, message (optional)
- Format: `https://wa.me/number?text=message`

## Customization Options

- **QR Color**: Foreground color of the QR pattern (default: black `#000000`)
- **Background Color**: Background color (default: white `#ffffff`)
- **Size**: Small (4), Medium (6), Large (10) — refers to the cell size multiplier
- **Error Correction**: L (7%), M (15%), Q (25%), H (30%) — higher levels make QR codes more resilient but larger

## Download Formats

- **PNG**: Raster image, best for digital use (web, social media, messaging)
- **SVG**: Vector image, best for print (business cards, flyers, posters) — scales without quality loss

## Technical Details

- Pure HTML5, CSS3, vanilla JavaScript — no frameworks, no build step
- QR generation library: [qrcode-generator](https://github.com/kazuhikoarase/qrcode-generator) by Kazuhiko Arase (MIT license)
- All processing happens client-side in a `<canvas>` element
- No cookies, no analytics, no tracking pixels, no server-side processing
- Responsive mobile-first design with automatic dark mode

## Languages

Available in 7 languages: English, Spanish, French, German, Italian, Portuguese and Dutch.

## Pages and URLs

| Page | English | Spanish | French | German | Italian | Portuguese | Dutch |
|------|---------|---------|--------|--------|---------|------------|-------|
| Homepage (Generator) | https://abcqr.com/ | https://abcqr.com/es/ | https://abcqr.com/fr/ | https://abcqr.com/de/ | https://abcqr.com/it/ | https://abcqr.com/pt/ | https://abcqr.com/nl/ |
| FAQ & Help | https://abcqr.com/faq.html | https://abcqr.com/es/faq.html | https://abcqr.com/fr/faq.html | https://abcqr.com/de/faq.html | https://abcqr.com/it/faq.html | https://abcqr.com/pt/faq.html | https://abcqr.com/nl/faq.html |
| About | https://abcqr.com/about.html | https://abcqr.com/es/about.html | https://abcqr.com/fr/about.html | https://abcqr.com/de/about.html | https://abcqr.com/it/about.html | https://abcqr.com/pt/about.html | https://abcqr.com/nl/about.html |
| Privacy & Disclaimer | https://abcqr.com/privacy.html | https://abcqr.com/es/privacy.html | https://abcqr.com/fr/privacy.html | https://abcqr.com/de/privacy.html | https://abcqr.com/it/privacy.html | https://abcqr.com/pt/privacy.html | https://abcqr.com/nl/privacy.html |

## API / Integration

ABCQR does not have an API. It is a static website with no backend. All QR code generation is performed client-side via JavaScript. To generate QR codes programmatically, use the underlying [qrcode-generator](https://github.com/kazuhikoarase/qrcode-generator) library directly.

## Author

- **Company**: [Color Vivo Internet](https://colorvivo.com)
- **Founder**: [David Carrero](https://carrero.es)
- **Location**: Madrid and Herencia (Ciudad Real), Spain
- **Hosting**: [Stackscale](https://www.stackscale.com) cloud infrastructure in Spain

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