QR Code Generator (Free, No Sign-up, No Expiration)
How to Use
- Enter text or a URL in the input field.
- Select the error correction level (L, M, Q, or H).
- Adjust the QR code size if needed.
- The QR code is generated in real time.
- Click Download PNG to save the QR code image.
What Is a QR Code?
A QR (Quick Response) code is a two-dimensional barcode that stores data in a grid of black and white squares. It was invented in 1994 by Denso Wave, a subsidiary of Toyota, originally to track automotive parts during manufacturing. Unlike traditional barcodes that store data in one direction, QR codes encode information both horizontally and vertically, allowing them to hold significantly more data — up to around 4,000 alphanumeric characters. QR codes can be scanned by any smartphone camera, making them one of the most accessible ways to bridge physical and digital content.
Use Cases
- URLs — link to websites, landing pages, or app download pages from printed materials.
- Wi-Fi connection — encode network name, password, and encryption type so others can connect by scanning.
- Contact cards — share vCard data containing name, phone number, email, and address.
- Payments — mobile payment services use QR codes for quick point-of-sale transactions.
- Event tickets — encode ticket IDs or booking references for fast check-in at events and venues.
Tips for Better QR Codes
- Keep data short — shorter text produces simpler QR codes that are easier to scan, especially at small sizes.
- Test before printing — always scan your generated QR code with a phone to verify it works correctly.
- Use higher error correction for physical use — if the QR code will be printed on packaging, posters, or stickers, choose Q or H level to tolerate wear, partial damage, or dirt.
- Ensure sufficient contrast — QR codes work best with dark modules on a light background. Avoid low-contrast color combinations.
- Add a quiet zone — leave some white space around the QR code so scanners can detect its boundaries reliably.
Error Correction Levels
- L (Low): ~7% recovery. Smallest QR code, ideal for clean environments.
- M (Medium): ~15% recovery. Default, good balance of size and reliability.
- Q (Quartile): ~25% recovery. Suitable for moderate damage tolerance.
- H (High): ~30% recovery. Best for QR codes that may be partially obscured or damaged.
Privacy
All QR code generation happens in your browser. No data is sent to any server.
FAQ
What is the difference between error correction levels L, M, Q, and H?
They set how much of the code can be dirty or obscured and still scan: L recovers about 7%, M about 15%, Q about 25%, and H about 30%. Higher levels are more durable but make the code denser and more complex for the same data.
Does the generated QR code expire, and do I need to sign up?
No. The QR codes are static — they encode the URL or text directly, so they never expire and work permanently. No sign-up or account is required, and it is completely free.
Are the URLs or personal data I enter sent to a server?
No. QR code generation happens entirely in your browser, and the text or URL you enter is never sent to or stored on a server. You can safely encode sensitive content like Wi-Fi passwords or contact details.
How much text can a QR code hold?
A QR code can store up to roughly 4,000 alphanumeric characters. But the more data it holds, the more complex the code becomes and the harder it is to scan at small sizes. For sharing links, a shortened URL keeps the code simple.
Can I download and print the generated QR code?
Yes. Use the Download PNG button to save it as a PNG image. For print use, choose error correction level Q or H and keep a sufficient quiet zone (margin) and strong light-dark contrast so it scans reliably.