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Channel Splitter
Separate the red, green, blue and alpha channels of an image into greyscale files.
Split the channels
Channel: —
How to use the Channel Splitter
- Load the image whose channels you want to separate.
- Pick a channel to preview it as a greyscale image on the canvas.
- Click a download link to save the red, green, blue or alpha channel as a PNG.
Features
- Red, green, blue and alpha extracted separately
- Each channel previewed as a greyscale image
- One click download for every channel
- Transparency is preserved in the alpha channel
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Frequently Asked Questions
Common questions about the free online channel splitter.
Every colour image is built from a red, a green and a blue layer plus transparency. This tool
shows and exports each of those layers on its own.
The alpha channel holds transparency rather than colour, so opaque areas appear white and see
through areas appear black in the greyscale preview.
Channels are useful for making masks, editing luminance, creating displacement maps and
compositing work in image editing software.
No. The pixels are read with the browser file reader and drawn on a local canvas, so your
image never leaves the device.
Any image your browser supports, such as JPEG, PNG, WebP, GIF and BMP. Formats without
transparency simply produce a white alpha channel.
Each channel is saved as a greyscale PNG file named after the original image and the channel
name.
Only very large photos are scaled down for a fast preview, and every exported channel keeps
that same preview size.
One image is handled at a time. Load the next photo as soon as you have downloaded the
channels you need.
Yes. The splitter works in any modern mobile browser and can read photos straight from the
camera roll.
Yes. It is completely free with no account, no watermark and no limit on the number of
images.
Last updated: October 10, 2026