Create a QR-CODE file from your input in seconds—generate, preview, and download your QR code directly from your browser.
QR codes have become ubiquitous — from restaurant menus and product packaging to event tickets and business cards. Whether you need a simple URL-encoding QR code or a branded code with custom colors and an embedded logo, XConvert's free QR Code Generator creates high-quality codes instantly in your browser. No account required, no watermarks, no data uploaded to any server.
A QR (Quick Response) code is a two-dimensional barcode that stores data in a grid of black and white squares. Invented in 1994 by Denso Wave for tracking automotive parts, QR codes have since become the standard for encoding information that can be read quickly by smartphone cameras and dedicated scanners. Unlike traditional barcodes that store data in one dimension, QR codes use both horizontal and vertical axes, allowing them to encode significantly more information — up to 4,296 alphanumeric characters or 7,089 numeric digits.
QR codes include built-in error correction using Reed-Solomon codes, which means they can be read even when partially damaged, obscured, or covered by a logo. There are four error correction levels: Low (7% recovery), Medium (15%), Quartile (25%), and High (30%). Higher error correction increases the code's resilience but also increases its size (more modules are needed to store the redundancy data). This error correction capability is what makes it possible to embed logos in the center of QR codes without breaking their readability.
The data in a QR code can represent virtually anything: URLs, plain text, contact information (vCard), Wi-Fi network credentials, calendar events, geographic coordinates, or arbitrary binary data. The encoding format determines how scanning applications interpret the data — a URL triggers the browser, a phone number triggers the dialer, and Wi-Fi credentials trigger the network connection dialog.
| Feature | XConvert QR Generator | QR Code Monkey | GoQR.me | Google Charts API |
|---|---|---|---|---|
| Price | Free | Free (basic) | Free | Free |
| Runs in Browser | ✅ | ✅ | ✅ | ❌ (API) |
| No Account Required | ✅ | ✅ | ✅ | ✅ |
| Custom Colors | ✅ | ✅ | Limited | ❌ |
| Logo Embedding | ✅ | ✅ (paid HD) | ❌ | ❌ |
| SVG Export | ✅ | ✅ | ✅ | ❌ |
| No Watermark | ✅ | ✅ | ✅ | ✅ |
| Privacy (No Upload) | ✅ | ❌ | ❌ | ❌ |
| Error Correction Control | ✅ | ✅ | Limited | ✅ |
| Batch Generation | ❌ | ❌ | ❌ | ✅ (API) |
Marketing and advertising — Encode URLs to landing pages, promotional offers, or app download links. Place QR codes on print materials (flyers, posters, business cards) to bridge the gap between physical and digital marketing.
Restaurant and retail menus — Generate QR codes that link to digital menus, product catalogs, or ordering systems. This became standard practice during the pandemic and remains popular for its convenience and cost savings.
Event management — Create QR codes for event tickets, check-in systems, and attendee badges. Encode unique identifiers that can be scanned at entry points for fast, contactless verification.
Wi-Fi sharing — Generate QR codes that encode Wi-Fi network credentials (SSID, password, encryption type). Guests scan the code to connect automatically without typing the password. Perfect for offices, hotels, and home networks.
Contact information exchange — Encode vCard data (name, phone, email, company, address) in a QR code for business cards. Recipients scan the code to add your contact information directly to their phone's address book.
Inventory and asset tracking — Generate QR codes for labeling equipment, inventory items, or documents. Each code can link to a database record, maintenance log, or product specification page. For encoding structured data, see XConvert's JSON Formatter.
XConvert's QR Code Generator uses a client-side JavaScript implementation of the QR code specification (ISO/IEC 18004). The encoding process begins with data analysis — the input is examined to determine the most efficient encoding mode (numeric, alphanumeric, byte, or kanji). Numeric mode is the most compact, encoding three digits in 10 bits, while byte mode handles arbitrary UTF-8 data at 8 bits per character. The generator automatically selects the optimal mode or uses mixed-mode encoding when different segments of the input benefit from different modes.
After encoding, Reed-Solomon error correction codewords are generated according to the selected error correction level. The data and error correction codewords are then arranged in the QR code matrix following the specification's interleaving and placement rules. The matrix includes fixed patterns — finder patterns (the three large squares in the corners), alignment patterns, timing patterns, and format/version information — that help scanners locate and orient the code. A masking pattern is applied to the data region to optimize readability by balancing the distribution of black and white modules. The generator evaluates all eight standard mask patterns and selects the one that produces the best score according to the specification's penalty rules.
For logo embedding, the generator leverages the error correction capability of QR codes. When a logo is placed in the center, it effectively damages the modules it covers. By using High error correction (30% recovery), up to 30% of the code's data can be lost and still be recoverable. The generator calculates the maximum safe logo size based on the error correction level and code version, ensuring the resulting code remains scannable. Color customization is applied at the rendering stage — the module colors are changed from the default black/white to the user's chosen colors while maintaining sufficient contrast for reliable scanning. All processing happens in your browser; your content and logo images are never uploaded to any server.
Use High error correction when embedding logos — Logo embedding covers QR code modules, effectively damaging them. High error correction (30% recovery) provides the most room for logos while keeping the code scannable.
Maintain sufficient color contrast — QR scanners rely on contrast between foreground and background. Dark foreground on light background works best. Avoid low-contrast combinations like yellow on white or dark blue on black.
Test before printing — Always scan your generated QR code with multiple devices and scanning apps before printing or distributing. What looks good on screen may not scan reliably in all conditions.
Keep URLs short — Shorter data produces smaller, simpler QR codes that are easier to scan from a distance or at small sizes. Use URL shorteners for long links, or encode just the essential path.
Add a quiet zone — QR codes need a white border (quiet zone) of at least 4 modules around them to be reliably scanned. The generator includes this automatically, but be careful not to crop it when placing the code in designs.
Choose SVG for print, PNG for web — SVG files scale to any size without losing quality, making them ideal for print materials. PNG is better for web use where a fixed resolution is acceptable. For other image conversions, check out XConvert's image conversion tools.
You can encode URLs, plain text, email addresses, phone numbers, SMS messages, Wi-Fi credentials (SSID, password, encryption type), vCard contact information, calendar events, and geographic coordinates. The generator provides templates for common data types.
Yes. The maximum capacity depends on the data type and error correction level. At Low error correction, a QR code can hold up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes of binary data. Higher error correction levels reduce capacity because more space is used for redundancy.
No. The QR code is generated entirely in your browser using client-side JavaScript. Your content, including URLs, contact information, and Wi-Fi passwords, never leaves your machine. You can verify this by generating codes with your network connection disabled.
Yes. Upload a logo image and it will be placed in the center of the QR code. Use High error correction to ensure the code remains scannable despite the logo covering some modules. The generator calculates the maximum safe logo size automatically.
Error correction allows QR codes to be read even when partially damaged. Low (7%) is fine for digital-only use. Medium (15%) is good for general purpose. Quartile (25%) works well for codes that may get slightly damaged. High (30%) is recommended when embedding logos or for codes on surfaces that may get scratched or dirty.
PNG is a raster format with fixed pixel dimensions — good for web use and digital displays. SVG is a vector format that scales to any size without quality loss — ideal for print materials like business cards, posters, and packaging.
The minimum practical size depends on the amount of data encoded and the scanning distance. For a simple URL with Medium error correction, 2cm × 2cm (about 0.8 inches) is typically the minimum for reliable scanning with a smartphone at close range. More data requires larger codes.
No. QR codes are static data — they do not expire or stop working. However, if the code encodes a URL, the code will stop being useful if the URL becomes invalid. The QR code itself remains permanently scannable.
The generator produces standard square modules. Custom module shapes (rounded, dotted, etc.) are possible but may reduce scanning reliability with some readers. The standard square format ensures maximum compatibility.
Select "Wi-Fi" as the content type, then enter your network name (SSID), password, and encryption type (WPA/WPA2 or WEP). The generator creates a QR code in the standard Wi-Fi format that smartphones recognize automatically. For encoding other structured data, try XConvert's JSON Formatter or CSV tools.