Control Freak’s QR Code Generator

Logo

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Advanced Settings

Auto Capitalize Domain

Mix Encoding

Min Version

min size: 21 modules

Error Correction Level

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Mask Pattern?

Appearance

Round Off Bottom Right Modules

Module Style

Corner Radius (%)

Advanced

Background Padding

Colors

Foreground

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Preview

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Templates

Why is this QR code generator better than others?

Control Freak’s QR Code Generator is a free QR code generator for nerds and perfectionists who want full control over both the technical details and visual geometry of QR codes. Unlike typical QR generators that export a single flattened SVG path, this tool generates QR codes from individual editable rectangles so every module remains editable in Figma, Illustrator, and other design tools. It supports mixed encoding to generate the most efficient QR code possible and lets you inspect data module placement to see exactly where your data is stored. You can control error correction level, mask pattern, module geometry, and per corner radius for every element. Upload a logo and the QR code intelligently wraps modules to hug around it while maintaining scannability instead of cutting a square out of the middle. Export clean, fully editable SVGs with real shapes instead of baked vectors. Built in Rust for speed and correctness.

Details & explanation

For a more detailed explanation of QR code components, please refer to the Wikipedia article .

Components of a QR code

Data Segments

Each QR code data segment begins with a 4-bit indicator that specifies the encoding mode, as shown in the table below.

Indicator	Encoding	Bits per character
`0001`	Numeric	3 1⁄3
`0010`	Alphanumeric^*	5 1⁄2
`0100`	Byte	8
`1000`	Kanji	13

^*Oddly enough, the Alphanumeric mode only supports capital letters (no lowercase), which is why this generator includes an Auto Capitalize Domain feature. Since domain names are case insensitive, converting them to uppercase has no effect on how they work on the web, but it may allow the QR code segment to switch from byte mode to alphanumeric mode and reduce the number of bits needed to encode the text.

Then a character count indicator, whose bit length varies depending on the QR code version.

**Number of bits in the Character Count Indicator**
Encoding	Ver. 1–9	Ver. 10–26	Ver. 27–40
Numeric	10	12	14
Alphanumeric	9	11	13
Byte	8	16	16
Kanji	8	10	12

The data follows immediately after.