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BrushCue Tool

Extract Blue Channel from Image Online

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tap to choose a file

Go to Blue Channel editor →

What you can expect

Given the image you provide, selects the blue channel and sets the other channels to 0. Use for scientific analysis or an effect.

Blue Channel animation preview

Related tools

More BrushCue tools that fit this workflow.

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Red Channel animation preview

Red Channel

Given an input image, will extract just the red channel from an image. Useful for the stylistic effect or scientific analysis.

Green Channel animation preview

Green Channel

Given the image you provide, selects the green channel and sets the other channels to 0. Use for scientific analysis or an effect.

Frequently asked questions

How to isolate the blue channel of an image?
Select your file and the blue channel is extracted automatically — the red and green channels are set to zero.
What is the blue channel of an image?
It represents the intensity of blue light in each pixel. Isolating it renders the image as grayscale where brightness equals blue intensity.
What can I use the blue channel for?
Scientific analysis, creative effects, or understanding how blue tones contribute to your overall image.
What file formats can I export?
You can export as PNG, JPEG, WebP, TIFF, BMP, or HEIC.
Is this tool free to use?
Yes — completely free, no account needed. Your images are processed entirely in your browser and never uploaded to a server. Downloads have no watermarks.

For developers

Use Blue Channel from Python

Open the Jupyter notebook example to see how to run this tool from the BrushCue Python API, inspect the processing steps, and adapt the workflow for scripts or batch image jobs.

View Python notebook

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