Question 1

How do static QR codes work and why do they never expire?

Accepted Answer

A static QR code encodes your exact destination data (such as a website URL, Wi-Fi network credentials, or vCard contact card) directly into the black and white 2D matrix modules using the ISO/IEC 18004 standard. Because there are no middleman redirect servers involved, the code functions indefinitely as long as your website remains online. There are no trial periods, no renewal dates, and zero monthly fees.

Question 2

Do smartphone users need a dedicated scanner app?

Accepted Answer

No. The default camera applications on all modern Apple iOS (iPhone) and Google Android devices decode standard QR barcodes natively. Simply opening the camera and pointing it at the printed code displays an instant actionable prompt banner.

Question 3

Can I use these QR codes commercially for my business?

Accepted Answer

Yes. All QR codes generated on HD QR Code are free to use for personal and commercial applications, including product packaging, restaurant tabletop menus, billboard advertisements, business cards, and marketing collateral with no account required.

Question 4

What is the difference between static and dynamic QR codes?

Accepted Answer

Static QR codes store your exact raw link directly in the physical modules with zero third-party dependencies. Dynamic QR codes store an intermediate redirect URL pointing to a service provider cloud server. Many generators use temporary dynamic codes that can expire or require a paid plan.

Question 5

What types of content can I encode into a static QR code?

Accepted Answer

You can encode 24 distinct content formats, including website links, Wi-Fi network access keys, vCard digital business cards, direct phone calls, SMS messages, pre-formatted emails, calendar event invitations, Google Maps directions, and cryptocurrency addresses.

Question 6

Will my QR code stop working if your website is offline?

Accepted Answer

No. Once downloaded, your static QR code is completely independent of our website or servers. The optical data pattern directly encodes your destination address, meaning it functions forever without communicating with any external platform.

Question 7

Can I change the destination of a static QR code after printing?

Accepted Answer

No. Because static codes embed destination data physically within the matrix pattern, the encoded content is permanent once printed. To update your destination, you can either configure a server redirect on your own domain or generate a new code before starting large print runs.

Question 8

How many times can a static QR code be scanned?

Accepted Answer

There is no scan limit. Static QR codes can be scanned an unlimited number of times by millions of devices because each scan is an offline optical read executed directly by the user camera lens without server gatekeeping.

Question 9

What is the minimum physical print size for business cards and menus?

Accepted Answer

We recommend an absolute minimum of 20 mm × 20 mm for handheld materials like business cards and receipts. For tabletop menus and table tents scanned across dining tables, size at least 35 mm to 45 mm (1.5 inches). For wall posters, use at least 80 mm to 100 mm.

Question 10

Why is the 4-module quiet zone margin critical for scanning?

Accepted Answer

The quiet zone is the clear white border surrounding the QR code. Camera optical engines use this contrast buffer to isolate the 2D matrix from background text, graphics, and paper borders. Without at least 4 modules of clear margin, mobile cameras will treat the pattern as wallpaper texture and fail to scan.

Question 11

Can I use custom brand colors other than black and white?

Accepted Answer

Yes, provided that the foreground modules maintain at least a 4.5:1 contrast ratio against the background (meeting WCAG and ISO optical thresholds). Deep navy, forest green, and dark charcoal on pure white work exceptionally well. Avoid light pastels, yellow, or gold on white.

Question 12

Should I download vector SVG or high-resolution PNG for commercial printing?

Accepted Answer

Always supply vector SVG or EPS files to commercial printers and prepress graphic designers. Vector SVG files possess infinite mathematical resolution and will never pixelate or blur when enlarged from business cards to massive trade show backdrops.

Question 13

Can I put my company logo in the center of a QR code?

Accepted Answer

Yes. QR codes contain Reed-Solomon error correction that reconstructs damaged or occluded modules. When adding a center logo, set error correction to Level H (30% redundancy) and limit the logo area to under 20% of total matrix area to prevent scanning delays.

Question 14

How does dot styling (rounded, dots, classy) affect scannability?

Accepted Answer

Standard square modules provide the sharpest contrast edges and longest scanning distance. Rounded and dotted modules are fully scannable when high color contrast (at least 7:1) is preserved, but slightly decrease optical contrast in dim indoor lighting.

Question 15

What print DPI should I use for razor-sharp commercial printing?

Accepted Answer

Commercial offset and digital printers operate at 300 DPI (dots per inch). Our print calculator automatically computes pixel dimensions at 300 DPI (for instance, 413×413 pixels for a 35 mm tabletop code) to guarantee crisp module edges.

Question 16

How far away can someone scan a QR code on a poster or banner?

Accepted Answer

Follow the optical 10:1 distance rule: the scanning distance is roughly 10 times the width of the QR code. For a customer standing 1 meter (100 cm) away, your QR code should measure at least 10 cm (100 mm) wide.

Question 17

Is my data or QR content stored on your servers?

Accepted Answer

No. All QR code matrix synthesis, computer vision diagnostics, and scan simulations execute 100% client-side in your local web browser memory. Your URLs, Wi-Fi passwords, contact cards, and uploaded images are never uploaded to our servers or stored in any database.

Question 18

Does HD QR Code track or log user scans or IP addresses?

Accepted Answer

No. Because these are genuine static QR codes with zero redirect proxies, scanners connect directly from their phone camera to your destination link. There are no tracking intermediaries, no analytics cookies, and no telemetry tracking your visitors.

Question 19

Are Wi-Fi passwords and vCard contacts secure in static codes?

Accepted Answer

Static codes store data in standard plaintext schemas (such as WIFI: or BEGIN:VCARD). Anyone who scans the code can read those credentials. For Wi-Fi codes, only post the QR code in areas where you intend trusted visitors to connect.

Question 20

How can I rescue a code that was created with an expiring shortener?

Accepted Answer

Use our Check tab to upload or drop your QR image. Our client-side repair engine decodes the underlying bitstream, warns if it detects third-party tracking redirect domains, and allows you to recreate it as a permanent static code with one click.

Question 21

Can static QR codes be hijacked or redirected by malicious third parties?

Accepted Answer

No. Because static codes directly contain the final destination address without third-party redirection servers, there is no intermediary platform that can alter where the code points once it is printed.

Question 22

Are any analytics cookies or telemetry injected into generated codes?

Accepted Answer

Zero. The generated QR bitstream contains only your verbatim input characters. We do not inject tracking UTM parameters, affiliate IDs, or redirect headers into your data.

Question 23

Why don't you require an account or user registration?

Accepted Answer

Because our application processes everything locally within your browser, there is no user database, no email capture, and no login credential management needed. The tool is free to use with no account required.

Question 24

How does client-side browser matrix generation protect sensitive credentials?

Accepted Answer

When creating codes for internal office Wi-Fi, private document links, or personal phone numbers, data never leaves your device network stack. The mathematical matrix is drawn on an HTML5 canvas strictly in local RAM.

Online QR Code Quality Checker

Scan-tested in your browser

No Expiration for Static Codes

Private by Design

The 4 Essential Quality Metrics We Evaluate

1. Luminance Contrast (WCAG 4.5:1)

2. Quiet Zone Boundary (≥4 Modules)

3. Resolution & Pixel Density

4. Color Polarity

Everything You Need to Know About QR Codes