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Apply Color Matrix to Image Online

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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 →
Channel Mixer animation preview

Channel Mixer

Remix the red, green, and blue channels with a full 3x3 matrix plus offsets. Swap channels, build custom black-and-white mixes, or dial in cross-processed color science.

Adjust Channels animation preview

Adjust Channels

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

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Online Scientific Image Processing Tools

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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

Build your own

Create projects with your custom presets

Save work, organize projects, and keep your favorite tool setups ready to go. No login required — everything is stored privately on your computer.

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