Free QR Code Generator
Free online free qr code generator. Process data instantly in your browser. No upload, no signup, fully private.
Local processingWhat is Free QR Code Generator?
A QR Code (Quick Response Code) is a two-dimensional barcode that stores data in a matrix of black and white squares. Unlike traditional one-dimensional barcodes that hold up to 20 characters, QR codes can store up to 7,089 numeric characters or 4,296 alphanumeric characters. They are readable by smartphone cameras and QR scanner apps, making them ideal for sharing URLs, contact information, Wi-Fi credentials, payment links, and product details.
How It Works
This generator creates QR codes entirely in your browser using a JavaScript QR encoding library. The input text or URL is encoded into a matrix following the ISO/IEC 18004 standard. Error correction is applied using Reed-Solomon coding (level L by default), allowing the code to be read even if partially damaged. The resulting matrix is rendered as an SVG or PNG image that can be downloaded. No data is sent to any server — all encoding happens locally.
Common Use Cases
- Share a website URL on printed materials — users scan to visit without typing
- Encode Wi-Fi credentials — guests scan to connect to your network instantly
- Create payment links — display QR code for mobile wallet payments (Alipay, WeChat Pay, PayPal)
- Share contact information (vCard) — scan to add to phone contacts without manual entry
- Product labeling — encode serial numbers or product URLs for inventory tracking
Technical Details
Standard: ISO/IEC 18004. Capacity: numeric 7,089 / alphanumeric 4,296 / binary 2,953 / kanji 1,817 chars. Error correction: L (7%), M (15%), Q (25%), H (30%). Reed-Solomon error correction allows partial recovery if code is damaged. Version 1 (21×21) to Version 40 (177×177). Output: SVG vector or PNG raster. All processing local — no server roundtrip.
How to Use
Enter your input above. Results update automatically as you type. Use the download button to save the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
Is this QR code generator free?
Yes. This tool is 100% free with no signup, no watermark, and no usage limit. Generate as many QR codes as you need.
Does this tool upload my data?
No. All QR code generation happens locally in your browser. Your text or URL is never sent to any server.
What data can I encode in a QR code?
You can encode URLs, plain text, phone numbers, SMS messages, email addresses, Wi-Fi credentials, and contact information (vCard). The maximum capacity depends on the data type and error correction level.
What error correction level should I use?
Level L (7%) is suitable for digital display. Level M (15%) is recommended for general use. Level Q (25%) is good for printed materials. Level H (30%) is best for industrial environments where the code may get damaged.
Why is my QR code not scanning?
Common causes: too much data for the code size, low contrast between foreground and background, the code is too small when printed, or the scanning app doesn't support the data format. Try reducing the input length or increasing error correction level.
Can I use the generated QR code commercially?
Yes. QR codes are an open standard (ISO/IEC 18004). You can use the generated codes for any purpose, including commercial products and marketing materials.