QR Code

QR Code Generator

Turn text or URLs into downloadable QR codes.

QR Code Generator

Turn text or URLs into downloadable QR codes.

Text or URL

Everything is generated locally in your browser.

Size (px)

Between 100 and 800 px for best clarity.

Margin (quiet zone)

Add padding so scanners can detect the code reliably.

Error correction

Higher levels keep codes scannable even with blemishes.

Foreground color

Background color

Preview

Download the QR image once it looks right.

Enter text to see your QR code preview.

What

QR Code Generator definition

A QR code encodes text or URLs into a scannable square barcode.

Cases

Use Cases

Share a URL on posters or slides

Create Wi-Fi or contact QR codes

Generate quick links for mobile testing

How To

How to Create a QR Code

A step-by-step guide to generating QR codes from text or URLs.

Enter content

Type the URL or text to encode into the QR code.

Adjust options

Set size, margin, error correction level, and colors.

Download

Preview the code and download it as PNG.

Knowledge

Understanding QR Codes

What is a QR Code?

QR (Quick Response) codes are two-dimensional barcodes that store data in patterns of black and white squares. They can be scanned by cameras and decoded into text, URLs, or other data formats.

QR Code Capacity

QR codes can store up to 3KB of data—about 4,296 alphanumeric characters. However, smaller data creates simpler codes that scan more reliably. For most uses, keep content under 100 characters.

Error Correction Levels

QR codes have four error correction levels: L (7%), M (15%), Q (25%), H (30%). Higher levels allow the code to be read even if partially damaged or obscured, but result in denser patterns.

Quiet Zone

The quiet zone is the blank margin around a QR code. It helps scanners identify where the code begins. Without adequate quiet zone (at least 4 modules), scanning reliability decreases significantly.

Common QR Content Types

URLs are most common, but QR codes can encode: Wi-Fi credentials (WIFI:T:WPA;S:...), contact cards (vCard), calendar events (vCal), phone numbers (tel:), SMS (smsto:), and plain text.

FAQ

QR code generator FAQ

What can I put inside a QR code?

Any text works: URLs, Wi-Fi config, calendar links, contact cards, or short notes.

Which error correction level should I choose?

Use M for most cases. Pick H when printing small, using colors, or adding a logo so scans stay reliable.

Why does the quiet zone matter?

A clear margin helps scanners detect the edges. Keep at least 2-4 modules of padding.

Can I customize colors safely?

Yes, but keep strong contrast (dark foreground on light background) to avoid scan failures.

How big should I export for print?

For small stickers, 300-400 px usually works; go larger for posters or if the code will be viewed from farther away.

Is any of my data sent to a server?

No. Generation happens fully in the browser without network requests.

Can I reuse the image offline?

Yes. Download the PNG and reuse it anywhere; the data URL is also copyable for embedding.

How do I generate a Wi‑Fi QR?

Enter WIFI:T:WPA;S:SSID;P:password;; as the text. Use T:nopass for open networks, add H:true for hidden ones, and escape semicolons/backslashes as \; or \\.

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QR Code

QR Code Generator

Turn text or URLs into downloadable QR codes.

QR Code Generator

Turn text or URLs into downloadable QR codes.

Text or URL

Everything is generated locally in your browser.

Size (px)

Between 100 and 800 px for best clarity.

Margin (quiet zone)

Add padding so scanners can detect the code reliably.

Error correction

Higher levels keep codes scannable even with blemishes.

Foreground color

Background color

Preview

Download the QR image once it looks right.

Enter text to see your QR code preview.

What

QR Code Generator definition

A QR code encodes text or URLs into a scannable square barcode.

Cases

Use Cases

Share a URL on posters or slides

Create Wi-Fi or contact QR codes

Generate quick links for mobile testing

How To

How to Create a QR Code

A step-by-step guide to generating QR codes from text or URLs.

Enter content

Type the URL or text to encode into the QR code.

Adjust options

Set size, margin, error correction level, and colors.

Download

Preview the code and download it as PNG.

Knowledge

Understanding QR Codes

What is a QR Code?

QR (Quick Response) codes are two-dimensional barcodes that store data in patterns of black and white squares. They can be scanned by cameras and decoded into text, URLs, or other data formats.

QR Code Capacity

QR codes can store up to 3KB of data—about 4,296 alphanumeric characters. However, smaller data creates simpler codes that scan more reliably. For most uses, keep content under 100 characters.

Error Correction Levels

QR codes have four error correction levels: L (7%), M (15%), Q (25%), H (30%). Higher levels allow the code to be read even if partially damaged or obscured, but result in denser patterns.

Quiet Zone

The quiet zone is the blank margin around a QR code. It helps scanners identify where the code begins. Without adequate quiet zone (at least 4 modules), scanning reliability decreases significantly.

Common QR Content Types

URLs are most common, but QR codes can encode: Wi-Fi credentials (WIFI:T:WPA;S:...), contact cards (vCard), calendar events (vCal), phone numbers (tel:), SMS (smsto:), and plain text.

FAQ

QR code generator FAQ

What can I put inside a QR code?

Any text works: URLs, Wi-Fi config, calendar links, contact cards, or short notes.

Which error correction level should I choose?

Use M for most cases. Pick H when printing small, using colors, or adding a logo so scans stay reliable.

Why does the quiet zone matter?

A clear margin helps scanners detect the edges. Keep at least 2-4 modules of padding.

Can I customize colors safely?

Yes, but keep strong contrast (dark foreground on light background) to avoid scan failures.

How big should I export for print?

For small stickers, 300-400 px usually works; go larger for posters or if the code will be viewed from farther away.

Is any of my data sent to a server?

No. Generation happens fully in the browser without network requests.

Can I reuse the image offline?

Yes. Download the PNG and reuse it anywhere; the data URL is also copyable for embedding.

How do I generate a Wi‑Fi QR?

Enter WIFI:T:WPA;S:SSID;P:password;; as the text. Use T:nopass for open networks, add H:true for hidden ones, and escape semicolons/backslashes as \; or \\.