How do I create a QR code for a website?

Simply select the 'URL' type, enter your full website address (including https://), and customize your design. Your QR code will update in real-time.

Are these QR codes permanent?

Yes. These are static QR codes, which means the information is encoded directly into the pixel pattern. They never expire and will work as long as the destination URL remains active.

What is the best format for printing QR codes?

For print, always use the SVG format. SVG is a vector format that can be scaled to any size (from business cards to billboards) without losing quality or becoming blurry.

Can I add a logo to my QR code?

Yes! You can upload custom logos to brand your QR code. When adding a logo, always set the 'Error Correction' to 'High (H)' to ensure the code remains scannable.

Why is my QR code not scanning?

Common reasons include low contrast between the foreground and background, a logo that is too large, or an exotic pixel shape. Ensure you have high contrast and high error correction for complex designs.

Do I need a special app to scan these codes?

Most modern smartphones from Apple and Android have QR code scanning built directly into the native camera app. Simply point your camera at the code.

How small can I print a QR code?

For reliable scanning, a QR code should be at least 2cm x 2cm (0.8in x 0.8in). If your design is complex or includes a logo, we recommend printing at a slightly larger size.

Is my data safe when using this generator?

Yes. This generator runs entirely in your local browser. Your URLs, text, and logos are never sent to our servers, ensuring 100% privacy and security.

QR Code Generator | Calculover

QR Code Generator

Create free, customizable QR codes for URLs, WiFi, Bitcoin, and more. No sign-up required.

Type

URL / Text

🔗

Enter the full URL including https://

Output Size

Error Correction

Use "H" for logos. Larger sizes for print.

Email Address

Subject

Body

BCC (Optional)

Phone Number

Message

First Name

Last Name

Organization

Job Title

Phone

Website

Address Type

Address

X/Twitter

Network Name (SSID)

Password

Encryption

Hidden Network

Event Title

Start

End

Location

Description

Latitude

Longitude

Example: San Francisco is 37.7749, -122.4194

Cryptocurrency

Amount

Wallet Address

Phone Number

📞

Include country code. Scanning opens the phone dialer directly.

Phone Number (no + or spaces)

💬

Country code + number, no symbols. e.g. 14155552671

Pre-filled Message (optional)

Platform

App Store URL

Full App Store URL for your app

Package Name

Your app's package name from the Play Store URL

Smart / Deep Link URL

Use AppsFlyer, Branch, or similar universal deep-link URL

Quick Palettes

Background

#FFFFFF

Foreground

#000000

Corner Eye

#00F3FF

Gradient

Transparent Background

Template Frame

Frame Text

Customize the text displayed on the frame

Accent Color

#00F3FF

Platform Icon

Data Pattern

Outer Eye

Inner Eye

Style Presets

Logo Overlay

Drag & Drop or Click to Upload

Logo Size 35%

Adjust how much of the QR code the logo covers

Match QR Background

#FFFFFF

Use this to blend the logo box with the QR background

Transparent Logo Background

Use if your logo is a transparent PNG

BULK QR GENERATION

Generate up to 100 QR codes at once from a simple text file. Each line becomes its own QR code — all styled with your current design settings. You'll get a ZIP file with every QR code as a PNG.

Style your QR
in other tabs

Upload a CSV
or text file

Download ZIP
of all QR codes

Upload File

Drop CSV or TXT file here, or click to browse

One URL or text per line. Max 100 items. Download example CSV

What should the file look like?

https://mysite.com/product-1
https://mysite.com/product-2
https://mysite.com/product-3
Table 1 - Scan to order
Table 2 - Scan to order
Each line = one QR code in the ZIP.

All QR codes inherit your current colors, patterns, frame, and logo from the other tabs.

Version --

Grid --

Bytes --

Capacity

Scan Quality --

How to Use This Calculator

Choose Content Type

Select the type of data to encode: URL, text, email, phone, Wi-Fi, vCard, or other supported formats.

Enter Your Data

Input the URL, contact details, or text content you want to embed in the QR code.

Customize & Download

Adjust colors, add a logo, set size and error correction level, then download as PNG, SVG, or PDF.

Formula & Methodology

Module Count

Modules = (4 × Version) + 17

QR version 1 = 21×21 modules; each version adds 4 modules per side up to version 40 (177×177).

Data Capacity (Alphanumeric)

Max Characters ≈ Version-dependent lookup × Error Correction Factor

Version 10 with M correction holds ~311 alphanumeric characters.

Error Correction Levels

L = 7%, M = 15%, Q = 25%, H = 30%

Higher correction allows more damage tolerance but reduces data capacity.

Key Terms

QR Code

Quick Response code — a 2D barcode that stores data in a matrix of black and white modules.

Error Correction

Reed-Solomon codes that allow the QR code to be read even when partially damaged or obscured.

Quiet Zone

The mandatory white border around a QR code (minimum 4 modules wide) required for scanners to detect edges.

Module

A single black or white square unit in the QR code grid.

vCard

A digital contact card format that QR codes can encode for instant contact sharing.

Real-World Examples

Example 1

Marketing URL

Type: URL, Data: https://example.com/promo, Error: M (15%), Size: 300px

Generates a 25×25 module QR code. Scannable from 10+ feet at this size.

Example 2

Wi-Fi Access

Type: Wi-Fi, SSID: GuestNet, Password: Welcome2024, Encryption: WPA2

Guests scan to auto-connect. Error correction H recommended for printed signage.

Error Correction Level Comparison

Level	Recovery	Best For	Data Capacity Impact
L (Low)	~7%	Digital screens, clean environments	Maximum data capacity
M (Medium)	~15%	General use, marketing materials	Good balance
Q (Quartile)	~25%	Outdoor signage, wear-prone surfaces	Reduced capacity
H (High)	~30%	Logo overlay, harsh environments	Minimum data capacity

QR Code Best Practices for Marketing

Design for Scannability

The most common QR code failure is printing too small. A QR code should be at least 2cm × 2cm for close-range scanning (business cards, table tents) and 25+ cm for posters or billboards. Always test your QR code on multiple devices before printing. Maintain high contrast between foreground and background colors — dark modules on light background works best.

Adding Logos Safely

You can place a logo in the center of a QR code by using error correction level H (30% recovery). The logo should cover no more than 20-25% of the code area. Always test scanability after adding a logo, as some scanner apps handle damaged codes differently.