QR Code Expert - Ad-free & No-login Online Beautiful QR Code Generator / Scanner

QR Code Properties [Numeric, 25×25, ECL selected: M, boosted: Q]

Data Capacity [5596 characters]

The data capacity of a QR code depends on the entered text charset and the error correction level.
The table below shows the maximum number of characters that can be stored for each encoding mode and error correction level.

Mode	L	M	Q	H
Numeric	7089	5596	3993	3057
Alphanumeric	4296	3391	2420	1852
Byte	2953	2331	1663	1273

Encoding Mode [Numeric]

Encoding modes are used to store data more efficiently. The list of supported modes is provided in the table below:

Mode	Character set	Compression
Numeric	0, 1, 2, 3, 4, 5, 6, 7, 8, 9	3 digits per 10 bits
Alphanumeric	0-9, A-Z (uppercase letters only), space, $, %, *, +, -, ., /, :	2 chars per 11 bits
Byte	Characters from the UTF-8 charset	Each char occupies 8 bits or more

The optimal encoding mode is selected automatically based on the data entered.

Module Count [25×25]

QR code versions range from 1 to 40. Each version has a different number of modules (black and white dots), which define the image dimensions. For version 1, the size is 21×21; for version 2, it’s 25×25; and so on. The higher the version, the more data can be stored, and the larger the QR code image becomes.
The lowest possible QR code version is selected automatically based on the data entered.

Error Correction Level (ECL) [selected: M, boosted: Q]

The error correction feature allows QR codes to be scanned successfully, even if they are dirty or damaged. Higher levels provide better error tolerance but reduce data capacity.
If the probability of QR code damage is low (for example, if it is displayed on a monitor), the Low or Medium levels are safe to use.
The possible levels are shown below:

Level	Error resistance
L (Low)	~7%
M (Medium) default	~15%
Q (Quartile)	~25%
H (High)	~30%

The percentage indicates the maximum obscure area beyond which the QR code becomes unscannable.
The error correction level is automatically boosted while preserving the same module count (the QR code version).

Image Size [300 px × 300 px]

pixels per width

You can specify the total image width in pixels or the module (dot) size. The image width will then be calculated based on the number of modules and the margin.
The height of the image is proportional to the width, maintaining the aspect ratio.
The module size cannot be smaller than 3 px × 3 px. To meet this requirement, the output image size is limited to a minimum value.

Margin [1 module, actual: 11 px]

modules

A QR code margin—also called a quiet zone—is the blank space required around a QR code for it to be scanned correctly. Standard QR codes have a minimum margin of 4 modules (dots) on all sides.
You may still choose to set the margin to 0 if you plan to add it later.

Dot Pattern & Color

Square

Circle

Rounded

Extra rounded

Classy

Classy rounded

Single color

Linear gradient

Radial gradient

Overlay image

#000000

Marker Shape & Color

Marker border

As dots

Square

Circle

Rounded

Custom marker color

Marker center

As dots

Square

Circle

Custom marker center color

Other Dot Settings [dot size: ×1, white dots: ✗]

Dot scale

Draw white dots

Background

If you want to set a dark background or image, enable the white dot drawing option in the section above.

#ffffff

Logo [✗]

Scale down the logo

At a scale of 100%, the logo will be at its largest size, possibly exceeding the maximum obscure area, beyond which the QR code becomes unscannable. It is recommended to set this value below 50% to ensure better QR code error resistance. Margin around the logo

Remove dots behind the logo

Shape [Square]

square

circle