Is the content I enter sent to a server?

No. QR code encoding (including Reed-Solomon error correction) is computed entirely in your browser.

What does the error correction level mean?

It's how much of the QR code can be damaged while still being readable. Higher levels tolerate more damage but make the QR code larger for the same content.

Can I use the generated QR code commercially?

Yes. The generated image is free to use with no license restrictions.

📱 QR Code Generator

Enter text or a URL and get an instant QR code.

Text / URL

Error Correction Level:

How to use

Enter text or a URL.
Choose an error correction level if needed.
Click "Generate" and download the PNG.

🎯 Use Cases

Business cards, flyers, posters — embed a website link as a QR code. Printed material is hard to fix once produced, so raise the error correction level to Q or higher to guard against creasing or smudging.
Wi-Fi sharing — easily share Wi-Fi details with visitors via QR. Enter a string in the format WIFI:T:WPA;S:networkname;P:password;; to create a QR code that connects automatically on scan.
Store or event signage — link to menus, surveys, or event pages. For small stickers placed on each table, level L is usually reliable enough.
Packaging and labels — link to product details or origin certification pages. For items exposed to repeated handling and wear, level H is recommended.

Example

Input

https://developk.kr/
(Error Correction Level: M)

Output

QR Version 2 · 25×25 modules · mask auto-selected
███████    █ █  █ ███████
█     █  ██ ██ █  █     █
█ ███ █ ███ █ █ █ █ ███ █
… (full code saved as PNG)

Encoding the URL https://developk.kr/ (20 bytes) at error correction level M produces a Version 2, 25×25-module QR code. The rows above are part of the actual module layout, including the top-left finder pattern; the complete code is saved as a PNG image.

Error correction levels & data capacity

Level	Damage tolerance	Numeric max (approx.)	Alphanumeric max (approx.)	Recommended for
L	~7%	7,089 chars	4,296 chars	On-screen display, low damage risk
M	~15%	5,596 chars	3,391 chars	General use (default)
Q	~25%	3,993 chars	2,420 chars	Printed material, outdoor signage
H	~30%	3,057 chars	1,852 chars	Embedded logos, high-wear environments

Higher correction levels add more error-correction data for the same content, which makes the QR code's module count (and physical size) larger. If the content is long or the code will be printed small, a lower level (L or M) can actually improve scan success.

FAQ

Is the content I enter sent to a server?: No. QR code encoding (including Reed-Solomon error correction) is computed entirely in your browser.
What does the error correction level mean?: It's how much of the QR code can be damaged while still being readable. Higher levels tolerate more damage but make the QR code larger for the same content.
Can I make a QR code for Wi-Fi or a contact card?: Yes. Enter text in the standard format — for Wi-Fi, WIFI:T:WPA;S:name;P:password;;; for a contact, a vCard string (BEGIN:VCARD...END:VCARD).
Can I use the generated QR code commercially?: Yes. The generated image is free to use with no license restrictions.