Create customizable QR codes with adjustable size, colors, and error correction.
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What is the QR Code Generator?
A QR (Quick Response) code is a two-dimensional barcode that stores data in a grid of black and white squares. When scanned with a smartphone camera or QR reader, it decodes the embedded information—whether that's a website link, plain text, contact details, email address, or WiFi login. QR codes can hold up to 4,296 characters and are read in milliseconds, making them ideal for rapid information transfer offline.
How it works
The generator encodes your input using the QR2508 standard algorithm, which maps data into a matrix of square modules (pixels). The tool automatically calculates the smallest code version needed to fit your data, then renders it as a PNG or SVG image. Higher error-correction levels (L, M, Q, H) let the code work even if up to 30% is damaged or obscured—the algorithm patches missing squares using Reed-Solomon error correction.
Examples
Input
Result
Notes
URL: https://example.com
A 200×200 px QR code grid
Scanning with any smartphone camera instantly opens the website—useful for flyers, business cards, or event posters.
WiFi: SSID + password + encryption type
A QR code with embedded network credentials
Guests can scan to auto-connect without typing the password—common in cafés and offices.
Text: 'Call 1-800-SUPPORT'
A 21×21 (or larger) module grid
Scanned QR codes display plain text instantly—handy for phone numbers, discount codes, or instructions.
How to use the QR Code Generator
Enter your content (URL, text, email, WiFi details, or contact info) in the input field
Choose error-correction level (Low, Medium, High, Very High) and code size/style if available
Click 'Generate' to create the QR code
Review the preview and scan with your phone to verify it works
Download as PNG (raster, transparent background) or SVG (vector, scalable)
Share, print, or embed in documents—no expiry date
Benefits
Instantly shareable: One scan opens links, contact info, or WiFi—no typing required
Works offline: QR codes don't need the internet to be readable (once printed or displayed)
Small file size: Encodes long data into a compact image (often < 5 KB for typical use)
High reliability: Error correction means codes still work if partially damaged or dirty
Free and unlimited: Generate as many codes as needed with no account, limits, or subscription
Trackable (with URL shorteners): Pair with Bitly or TinyURL to count scans and measure reach
Tips & common mistakes
Common mistakes
Using the lowest error-correction level on printed materials—outdoors or on packaging, always use 'High' (30% tolerance) to survive wear
Making QR codes too small on print—the minimum scannable size is roughly 1×1 cm (0.4×0.4 in); smaller codes may fail with standard phone cameras
Forgetting to test before deploying—always scan your generated code from at least two devices to confirm it resolves correctly
Hardcoding long URLs in QR codes—use a URL shortener to reduce module count, improve scan speed, and allow future redirection changes
Tips
Use a URL shortener (Bitly, TinyURL, Google Short URL) to shrink long links into smaller QR codes that scan faster and reliably
For offline use, choose 'High' or 'Very High' error correction—the extra modules add barely 10% size but let codes survive 30% damage
Save your QR code as SVG if you plan to print large (posters, billboards)—SVG scales infinitely without pixelation, while PNG degrades at extreme sizes
Pair QR codes with a clear call-to-action nearby (e.g., 'Scan for details') so users understand what scanning will do
Frequently asked questions
Can I make a QR code that expires or changes?
No, a static QR code doesn't expire. However, if you use a URL shortener (Bitly, Rebrandly), you can update the destination URL anytime without regenerating the code—the QR code stays the same but points to new content.
What's the difference between error-correction levels (L, M, Q, H)?
L (Low) tolerates ~7% damage, M (Medium) ~15%, Q (High) ~25%, H (Very High) ~30%. Higher levels add more redundancy, making the code slightly larger but much more durable for outdoor, printed, or worn materials.
How much data can one QR code hold?
Up to 4,296 characters of text or about 1,852 bytes of binary data. URLs are compressed efficiently—even a long link (100+ characters) fits into a small visible QR code with room to spare.
Can I customize the color, logo, or design of my QR code?
Basic generators (including this one) create standard black-and-white codes. For branded QR codes with logos or custom colors, use advanced tools like Canva or QR Server; be careful not to obscure too much data or scanners may fail.
Is it safe to use a QR code for passwords or sensitive data?
No. QR codes are not encrypted and anyone who scans it can see the data. For WiFi, use standard WPA2/WPA3 encryption. Never embed passwords, credit card numbers, or private keys directly in a QR code.
Why doesn't my QR code scan?
Check: (1) the code is at least 1×1 cm, (2) contrast between black and white is strong, (3) the camera is in focus, (4) the code hasn't been over-pixelated in resizing. Test with multiple scanner apps to isolate the problem.