QR Code Generator
Instantly generate high-resolution QR codes for URLs, text, or Wi-Fi configurations. Customize colors, scale sizes, and export as crisp vectors without network calls.
What is a QR Code Generator?
A QR Code Generator is a utility that translates text data—such as URLs, email addresses, phone numbers, or Wi-Fi credentials—into a scannable 2D matrix barcode (Quick Response code). First invented by Denso Wave in 1994, QR codes are now universally readable by almost all modern smartphone cameras.
Our generator operates 100% locally within your browser. Whether you are generating a link for a marketing campaign, creating a vCard, or sharing your home Wi-Fi password, the data you encode never touches an external server. This guarantees that your private information remains strictly confidential.
How to Generate a QR Code
- Enter Data: Type or paste the text, URL, or data you want to encode into the input box. You can use the "Templates" dropdown for specific data structures like Wi-Fi or Email.
- Configure Colors: Adjust the foreground (the dark pixels) and background colors to match your brand or design scheme. For maximum scannability, ensure high contrast between the two colors.
- Set Parameters: Choose an export size and an Error Correction Level (ECL).
- Download: The QR code preview updates automatically. Click "Download PNG" for a standard raster image or "Download SVG" for an infinitely scalable vector graphic.
Features of this Tool
- ✓ 100% client-side — your data is processed offline and never sent to a server.
- ✓ No sign-up, tracking, or artificial scan limits.
- ✓ Static QR Codes: The codes generated are static, meaning they will never expire or break as long as the underlying data (like a website URL) remains valid.
- ✓ Vector SVG Export: Unlike basic generators, you can download a pure SVG path, ideal for high-quality printing on business cards and posters.
- ✓ Real-time Preview: The barcode updates instantly with every keystroke or color change.
- ✓ Wi-Fi Templates: Instantly create complex configuration strings so guests can scan to join your network without typing a password.
Frequently Asked Questions
What is the Error Correction Level (ECL)?
Error Correction allows a QR code to remain scannable even if part of it is damaged, obscured, or covered by a logo. The levels are Low (7% recovery), Medium (15%), Quartile (25%), and High (30%). Higher error correction makes the QR code denser and more complex. If you aren't placing a logo inside the code, "Medium" is the standard recommended setting.
Why should I use SVG instead of PNG?
SVG (Scalable Vector Graphics) is a mathematical representation of the image, rather than a grid of pixels. If you download an SVG, you can scale it up to the size of a billboard without it ever becoming blurry or pixelated. PNGs are better for embedding directly into websites or sharing on social media.
Do these QR codes expire?
No. ZeroTools generates Static QR codes. The actual data (e.g., your website link) is mathematically encoded directly into the pattern of squares. Because there is no intermediary tracking server or redirect service, the QR code will work forever.
Is there a limit to how much text I can encode?
While technically a QR code can hold up to 4,000 alphanumeric characters, trying to encode a massive block of text will result in a matrix so dense that most smartphone cameras will fail to focus on it. We display a "High density" warning if your input exceeds 300 characters. For best results, encode short URLs.