How big should I print my QR code?

The rule of thumb: the QR code’s printed width should be at least 10× the scanning distance divided by 10. For a code scanned at 50 cm (a poster on a wall), print at least 5 cm wide. For a code scanned at 5 m (a billboard), print at least 50 cm wide. Always test with a real phone at the intended distance before going to print. Dense QR codes (long URLs, high error correction) need to be printed larger to stay scannable.

Can I add a logo in the center of the QR code?

A logo can cover up to ~30% of a QR code’s area and still scan IF you use error-correction level H (30% recoverable). Place the logo in the center (it covers the data matrix symmetrically) and keep the three finder patterns (the big squares in the corners) completely clear. This tool doesn’t add logos automatically — generate the QR at level H, then overlay your logo in any image editor. Always test-scan the result.

What’s the difference between static and dynamic QR codes?

A static QR code (what this tool generates) encodes the data directly — the URL, text, or WiFi string is baked into the image. You can’t change the destination without generating a new code. A dynamic QR code encodes a short URL that redirects to the real destination; you can change the redirect later without reprinting. Dynamic codes require a server and are usually a paid service. Static codes are free, private, and work forever — use them unless you specifically need redirect tracking or editable destinations.

Is it safe to put my WiFi password in a QR code?

Yes, with caveats. The QR code encodes the password in plaintext, so anyone who scans it (or photographs it) can read the password. Only share WiFi QR codes with people you trust, and don’t post them in public. This tool generates the QR locally — your password is never sent to a server. For guest networks, consider a separate guest SSID with a password you’re comfortable sharing.

Why won’t my QR code scan?

The four most common causes: (1) too small — print at least 2 cm wide for close-up scanning; (2) low contrast — use black modules on a white background; avoid colored or transparent backgrounds; (3) too dense — long URLs or high error-correction levels produce dense codes that need to be larger; (4) damaged or distorted — keep the code flat, clean, and well-lit. If a code won’t scan, try shortening the URL (use a shortener), lowering the error-correction level, or printing it larger.

Media

QR Generator

Generate downloadable QR codes for any text or URL.

qrcodebarcodeurl

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About the QR Generator

The QR Code Generator creates high-resolution QR codes for URLs, plain text, WiFi credentials, vCards, and email addresses — entirely in your browser using the qrcode library. You control the error-correction level (L/M/Q/H), which determines how much damage the code can sustain and still scan (a higher level lets you add a logo overlay or print on a surface that gets scuffed). Download as PNG (raster, for screen), SVG (vector, for print at any size), or copy the data URI directly into your HTML. Nothing is uploaded — the QR code is generated from your input locally, so it’s safe for WiFi passwords, private contact info, and internal URLs.

Hand-written guide

Examples

Input

URL: https://fernandeslabs.com/tools/qr-generator

Output

[ 25×25 module QR code, error level M, PNG download ]

Note: URL QR codes are the most common type. Short URLs scan faster than long ones.

Input

WiFi: WIFI:T:WPA;S:MyNetwork;P:SecretPass123;;

Output

[ WiFi QR — scanning auto-joins the network ]

Note: Format: WIFI:T:<security>;S:<ssid>;P:<password>;; — note the trailing semicolons.

Input

vCard: BEGIN:VCARD...END:VCARD

Output

[ Contact QR — scanning adds to phone contacts ]

Note: vCard 3.0 is universally supported by iOS and Android.

How to use

1
Choose the data type (URL, text, WiFi, vCard, email) from the dropdown. The input fields adapt to the type.
2
Enter your data. For WiFi, fill in the network name (SSID), password, and security type (WPA/WEP/none). For vCard, fill in name, phone, email, and URL.
3
Select the error-correction level: L (7% recoverable, densest), M (15%, default), Q (25%), or H (30%, sparsest but most durable). Use H if you plan to add a logo or print on a rough surface.
4
Pick the output size (128–1024 px for PNG; SVG scales infinitely) and click Generate. A live preview appears instantly.
5
Click Download PNG for screen use, Download SVG for print, or Copy Data URI to embed the QR directly in HTML/CSS.

Common use cases

Printing a QR code on a business card that links to your portfolio or vCard.
Creating a WiFi QR code for guests to scan and join your network without typing the password.
Adding a QR code to a poster or flyer that links to an event registration page.
Embedding a QR code in a restaurant menu that opens a digital version on the phone.
Generating a QR code for a 2FA backup code or a one-time setup link (use level H for durability).

Tips

Shorten long URLs before encoding them — shorter URLs produce smaller, denser, more reliable QR codes.
Always use black-on-white for maximum scan reliability. Colored QR codes look nice but scan less reliably.
Download SVG for print (scales to any size without pixelation) and PNG for screen.
Test your printed QR code with at least two different phones (iOS and Android) before mass-printing.
If you add a logo, use error-correction level H and keep the center logo under 30% of the code’s area.

Frequently asked questions

QR codes use Reed-Solomon error correction, which lets the code remain scannable even if part of it is damaged, dirty, or covered by a logo. There are four levels: L (recovers 7% of data), M (15%, the default), Q (25%), and H (30%). Higher levels make the code denser (more modules) and slightly harder to scan at small sizes, but more durable. Use L/M for clean digital display. Use Q/H if you’re printing on packaging, adding a logo overlay, or placing the code where it may get scuffed.

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