QR Code Art Generator

This is an AI-powered QR code generator that creates artistic QR codes using Stable Diffusion 1.5 and ControlNet models. The application uses a custom ComfyUI workflow to generate QR codes.

Tips:

Use detailed prompts for better results
Include style keywords like 'photorealistic', 'detailed', '8k'
Choose URL mode for web links or Plain Text mode for VCARD, WiFi credentials, calendar events, etc.
Try the examples below for inspiration
Copy/paste settings: After generation, copy the JSON settings string that appears below the image and paste it into "Import Settings from JSON" to reproduce exact results or share with others

Two Modes:

Artistic QR (New pipeline, default): More artistic and creative results with upscaling (slower, more creative, less scannable)
Standard QR (Old pipeline, more stable): Stable, accurate QR code generation (faster, more scannable, less creative)

Note:

Selecting image_size more then 704 might fail to generate image when other users are trying app at the same time.

Feel free to share your suggestions or feedback on how to improve the app! Thanks!

Input Type

URL: For web links (auto-removes https://). Plain Text: For VCARD, WiFi, calendar, location, etc. (no manipulation)

URL Plain Text

Prompt

QR Code Content

Image Size

Base size of the generated image. Final output will be 2x this size (e.g., 704 → 1408) due to the two-step enhancement process. Higher values use more VRAM and take longer to process.

512 1024

QR Code Border Size

Number of modules (squares) to use as border around the QR code. Higher values add more whitespace.

0 8

Error Correction Level

Higher error correction makes the QR code more scannable when damaged or obscured, but increases its size and complexity. High (30%) is recommended for artistic QR codes.

QR Module Size

Pixel width of the smallest QR code unit. Larger values improve readability but require a larger image size. 16 is a good starting point.

4 16

QR Code Style

Select the style of the QR code modules (squares). See examples below. Different styles can give your QR code a unique look while maintaining scannability.

Style Examples:

Square

Gapped Square

Circle

Rounded

Vertical Bars

Horizontal Bars

Enable Upscaling

Enable upscaling with RealESRGAN for higher quality output (enabled by default for artistic pipeline)

Use Custom Seed

Enable to use a specific seed for reproducible results

Seed

Seed value for reproducibility. Same seed with same settings will produce the same result.

0 2000000

FreeU Quality Enhancement

Enable FreeU

Enable FreeU quality enhancement (enabled by default for artistic pipeline)

FreeU B1 (Backbone 1)

Backbone feature enhancement for first layer. Higher values improve detail but may reduce blending. Range: 1.0-1.6, Default: 1.4

1 1.6

FreeU B2 (Backbone 2)

Backbone feature enhancement for second layer. Higher values improve texture. Range: 1.0-1.6, Default: 1.3

1 1.6

FreeU S1 (Skip 1)

Skip connection dampening for first layer. Lower values hide QR structure more. Range: 0.0-1.5, Default: 0.0

0 1.5

FreeU S2 (Skip 2)

Skip connection dampening for second layer. Balances scannability. Range: 0.0-1.5, Default: 1.3

0 1.5

SAG (Self-Attention Guidance)

Enable SAG

Enable Self-Attention Guidance for improved structural coherence and artistic blending

SAG Scale

Guidance strength. Higher values provide more structural coherence. Range: 0.0-3.0, Default: 0.5

0 3

SAG Blur Sigma

Blur amount for artistic blending. Higher values create softer, more artistic effects. Range: 0.0-5.0, Default: 0.5

0 5

ControlNet Strength (QR Code Preservation)

IMPORTANT: Lower values preserve QR structure better (more scannable). Higher values create more artistic effects but may reduce scannability.

First Pass Strength

Controls how much the AI modifies the QR in the first pass. LOWER = more scannable, HIGHER = more artistic. Try 0.30-0.40 for better scannability. Default: 0.45

0 1

Final Pass Strength

Controls how much the AI modifies the QR in the refinement pass. LOWER = preserves QR structure, HIGHER = more creative. Try 0.55-0.65 for balance. Default: 0.70

0 1

Generated Artistic QR Code

Status / Errors

Featured Examples

Click 'Load Settings' under any example to populate the form with those exact settings

Japanese Temple

Sunset Mountains

Roman City

Neapolitan Pizza

Poker Chips

Underwater Fish

Mediterranean Garden

Rice Fields

Cyberpunk City

Input Type

URL: For web links (auto-removes https://). Plain Text: For VCARD, WiFi, calendar, location, etc. (no manipulation)

URL Plain Text

Prompt

QR Code Content

Image Size

Base size of the generated image. Final output will be 2x this size (e.g., 512 → 1024) due to the two-step enhancement process. Higher values use more VRAM and take longer to process.

512 1024

QR Code Border Size

Number of modules (squares) to use as border around the QR code. Higher values add more whitespace.

0 8

Error Correction Level

Higher error correction makes the QR code more scannable when damaged or obscured, but increases its size and complexity. Medium (15%) is a good starting point for most uses.

QR Module Size

Pixel width of the smallest QR code unit. Larger values improve readability but require a larger image size. 12 is a good starting point.

4 16

QR Code Style

Select the style of the QR code modules (squares). See examples below. Different styles can give your QR code a unique look while maintaining scannability.

Style Examples:

Square

Gapped Square

Circle

Rounded

Vertical Bars

Horizontal Bars

Enable Upscaling

Enable upscaling with RealESRGAN for higher quality output (disabled by default for standard pipeline)

Enable FreeU

Enable FreeU quality enhancement (disabled by default for standard pipeline)

Use Custom Seed

Enable to use a specific seed for reproducible results

Seed

Seed value for reproducibility. Same seed with same settings will produce the same result.

0 2000000

ControlNet Strength (QR Code Preservation)

IMPORTANT: Lower values preserve QR structure better (more scannable). Higher values create more artistic effects but may reduce scannability.

First Pass Strength (Brightness + Tile)

Controls how much the AI modifies the QR in both ControlNet passes. LOWER = more scannable, HIGHER = more artistic. Try 0.35-0.50 for good balance. Default: 0.45

0 1

Final Pass Strength (Tile Refinement)

Controls the final tile ControlNet pass strength. Usually kept at 1.0 for clarity. Default: 1.0

0 1

Generated Standard QR Code

Status / Errors