Image RGB Channel Splitter
Pulls each colour channel out of the source pixels independently. Isolate mode keeps each channel coloured (red channel shows only the red values, green channel only the green, etc.); Grayscale mode renders each channel as a 0–255 brightness map, which is what photo editors mean by "split channels". PNG download per channel, all client-side.
Useful for inspecting JPEG colour-channel artefacts, identifying chromatic aberration, or pulling matte-style masks from a photo.
How to use
- Drop or pick an image.
- Choose Isolate (coloured) or Grayscale (intensity).
- Download whichever channels you need.
Frequently asked questions
- Why does the blue channel often look noisy?
- Bayer-pattern camera sensors capture twice as many green photosites as red or blue, and JPEG compression treats chroma harshly. The blue channel is usually the noisiest as a result.
- What about alpha?
- The alpha channel is dropped — output PNGs are fully opaque. If you need the alpha as its own grayscale image, run the input through a separate tool that exposes it.
- Why does a channel in grayscale mode look different from converting the photo to grayscale?
- A normal grayscale conversion weights the channels by how bright the eye perceives them — roughly 21% red, 72% green, 7% blue — while a channel map shows one channel's raw values with no weighting at all. That is why the green channel usually looks closest to an ordinary black-and-white version of the photo, and why the blue one looks unexpectedly dark.
- Can I put the channels back together afterwards?
- Not in this tool, which only splits. Any editor with channel operations can recombine three grayscale maps into one RGB image, and the result matches the original exactly — provided the maps were kept as PNG. Saving a channel as JPEG changes its values, so a recombination from JPEG channels will not reproduce the source.
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