ComfyUI Extension: AspectRatioAdvanced

Authored by Dehypnotic

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An advanced aspect ratio calculator and image scaler with flexible scaling modes and intelligent image handling.

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    README

    AspectRatioAdvanced - ComfyUI Node

    An advanced aspect ratio calculator and image scaler for ComfyUI with flexible scaling modes and intelligent image handling.

    <img width="399" height="604" alt="image" src="https://github.com/user-attachments/assets/8351df62-0a5e-479a-99c2-ff57d4e752f8" />

    Features

    šŸ“ Flexible Scaling

    • Aspect Ratio: Choose an aspect ratio to be calculated from target megapixels, min/max side, or input image.
    • Custom dimensions: Scale to custom width and height
    • Target Megapixels: Scale to achieve a specific resolution
    • Min Side: Set shortest dimension, maintain aspect ratio
    • Max Side: Set longest dimension, maintain aspect ratio
    • 12 preset aspect ratios: square, portrait, landscape, and social media formats

    šŸ–¼ļø Intelligent Image Processing

    • Optional image input automatically detects aspect ratio when use_image_ratio is set to Yes.
    • Real-time image scaling to calculated dimensions

    āš” Advanced Controls

    • Dimension flipping (portrait ā†” landscape)
    • Batch processing support
    • 8-divisible dimensions (latent space compatible)

    Installation

    1. Via ComfyUI Manager

    1. Open ComfyUI Manager ā†’ Custom Nodes
    2. Search for Aspect Ratio Advanced.
    3. Press Install and restart ComfyUI.

    2. Manually by clone or copy.

    1. Navigate to your ComfyUI custom nodes directory: 
      cd ComfyUI/custom_nodes/
    2. Clone or copy this repository: 
      git clone https://github.com/Dehypnotic/comfyui-aspect-ratio-advanced.git
    3. Restart ComfyUI

    Usage

    Basic Aspect Ratio Calculation

    1. Select desired aspect_ratio preset
    2. Choose scaling_mode (target megapixels, min or max side)
    3. Adjust the corresponding value

    With Image Input

    1. Connect an image node to the optional image input
    2. Set use_image_ratio to Yes to use the image's aspect ratio
    3. Set use_image_ratio to No to scale image to selected preset as describe above
    4. Optional image outputs will be scaled

    Custom Dimensions

    1. Select scaling_mode: custom dimensions
    2. Set custom_width and custom_height to desired values
    3. Connected image outputs will be scaled to these exact dimensions
    <img width="694" height="649" alt="image" src="https://github.com/user-attachments/assets/45ba58cd-6b4e-4a9c-ab32-6783c86e211b" />

    Node Inputs

    | Input | Type | Description | |-------|------|-------------| | custom_width | INT | Width when using custom aspect ratio | | custom_height | INT | Height when using custom aspect ratio | | scaling | COMBO | How to scale dimensions (megapixels/min/max side/aspect ratios) | | use_image_ratio | COMBO | Use connected image's ratio (Yes/No) | | target_megapixels | FLOAT | Target resolution in megapixels | | min_side | INT | Shortest dimension in pixels | | max_side | INT | Longest dimension in pixels | | flip_dimensions | COMBO | Swap width/height (No/Yes) | | batch_count | INT | Number of latent batches to generate | | image | IMAGE | Optional: Image to analyze/scale |

    Node Outputs

    | Output | Type | Description | |--------|------|-------------| | width | INT | Calculated width | | height | INT | Calculated height |
    | batch_count | INT | Batch count passthrough | | empty_latent | LATENT | Empty latent tensor | | scaled_image | IMAGE | Scaled input image (if provided) | | resolution_info | STRING | Human-readable resolution summary |

    Supported Aspect Ratios

    • 1:1 square - Perfect square format
    • 4:3 standard - Classic monitor/photo ratio
    • 3:2 classic - 35mm film ratio
    • 16:9 widescreen - Modern video/monitor standard
    • 21:9 ultrawide - Cinematic widescreen
    • 3:4 portrait - Vertical standard format
    • 2:3 photo - Vertical photo ratio
    • 9:16 mobile - Vertical video (TikTok, Instagram Stories)
    • 9:21 vertical - Extended vertical format
    • 4:5 social - Instagram post format
    • 5:7 print - Standard print ratio

    Technical Notes

    • All output dimensions are automatically rounded to multiples of 8 (required for latent space)
    • Minimum dimension is 64 pixels
    • Uses bilinear interpolation for high-quality image scaling
    • Compatible with all ComfyUI image processing workflows

    License

    MIT License - see LICENSE file for details.

    Changelog

    v0.1.0

    • Initial release
    • Support for 12 aspect ratio presets
    • Three scaling modes (megapixels, min/max side)
    • Optional image input with intelligent ratio detection
    • Real-time image scaling output

    Created for the ComfyUI community šŸ’™