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BrushCue Tool

Apply Color Matrix to Image Online

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Go to Linear Transform editor →

What you can expect

Multiply the RGBA values of a pixel by a 4×4 matrix with this browser-based tool to apply precise, linear color transformations such as channel mixing, color correction, and custom effects, all without changing image geometry.

Linear Transform animation preview

Related tools

More BrushCue tools that fit this workflow.

See all tools →
Adjust Channels animation preview

Adjust Channels

Add or subtract from the red, green, and blue channels independently to shift the image’s color balance.

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.

Frequently asked questions

How to apply a linear color transform to an image?
Select your file, then enter the 16 values of your 4×4 RGBA transformation matrix to apply a precise color operation.
What is a linear transform in image editing?
It multiplies each pixel's RGBA values by a 4×4 matrix, enabling precise custom color transformations beyond standard sliders.
Who is Linear Transform for?
Advanced users who need exact control over color mixing, channel swaps, or fully custom color grading operations.
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 Linear Transform 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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