BYTETOOLS

Image Channel Mixer

Rebuild each output channel from red, green and blue with Photoshop-style sliders, or mix your own black and white conversion. Free and fully in-browser.

Drop an image to remix its colour channelsProcessed locally — never uploaded

What is the Image Channel Mixer?

The ByteTools Image Channel Mixer rebuilds each output channel as a weighted blend of the original red, green and blue.

  • Red, green and blue weights from −200% to 200% for each output channel
  • A constant offset slider per row for lifting or crushing the result
  • Monochrome mode for custom black and white conversions
  • Presets for Photoshop 40/40/20, colour-filter looks, channel swap and faux infrared
  • Row-total readout that warns when brightness will shift
  • Live preview and full-resolution PNG export, all in-browser

How to use the Image Channel Mixer

  1. 1

    Drop an image into the upload area to load it.

  2. 2

    Pick a preset, or start from Identity and move the sliders yourself.

  3. 3

    For each output row, set how much red, green and blue it takes plus a constant offset.

  4. 4

    Tick Monochrome when you want one mix to drive all three outputs for a black and white conversion.

  5. 5

    Check the row totals, then click Download PNG to save the result.

About the Image Channel Mixer

The ByteTools Image Channel Mixer rebuilds each output channel as a weighted blend of the original red, green and blue. Every output row has four sliders — how much red, green and blue feed into it, plus a constant offset — so you can swap channels, exaggerate a single hue or build a colour grade that no one-click filter can reach.

Tick Monochrome and one row drives all three outputs, which is exactly how photographers convert to black and white: dial red up for a dramatic sky, green up for foliage, and watch the row total warn you when it drifts away from 100% and starts shifting overall brightness. Presets cover the Photoshop 40/40/20 default, colour-filter looks, a red and blue swap and a faux infrared.

The mix is applied to the canvas pixel buffer inside your browser, so processing is 100% local and nothing is uploaded to a server. The preview updates as you drag, and the Download PNG button re-runs the same matrix over the full-resolution image, so the file you save matches what you saw.

Frequently asked questions

What does a channel mixer actually do?

It computes each output channel as a weighted sum of all three input channels plus a constant, instead of leaving them independent. Setting output red to 50% red and 50% green, for example, blends greenery into the red channel and changes how the whole image is coloured.

How do I convert a photo to black and white with a channel mixer?

Tick Monochrome so a single mix feeds all three outputs, then adjust the three weights until the tones you care about separate. Heavy red darkens blue skies dramatically, heavy green brightens foliage and skin, and the Photoshop default of 40/40/20 is a safe neutral starting point.

Why should each row add up to 100%?

A row that totals 100% preserves the overall brightness of the image, so you change colour relationships without making the picture lighter or darker. Totals above 100% brighten and can clip highlights, while totals below it darken the result, which is why the tool prints a warning next to each row.

What does the constant slider do?

The constant adds or subtracts a fixed amount from that output channel regardless of the source pixels, on a scale of −100% to 100% of full brightness. A small positive constant lifts the blacks of that channel, which is how faded and cross-processed looks are built.

Is my photo uploaded when I use the channel mixer?

No. The mixing matrix is applied to canvas pixel data in your own browser and no image data is transmitted anywhere. That makes it safe for client work, unreleased product shots and personal photos alike.

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