Split Image into RGB Channels
Every colour pixel is three numbers, red, green and blue, plus an alpha value when the image has transparency. This tool saves each channel as its own greyscale image, where bright means a high value: useful for building masks, inspecting texture maps that pack data into channels, finding the channel with the best contrast for a black and white conversion, or checking colour noise.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JPG, PNG, WebP, HEIC, AVIF, GIF, TIFF, SVG, RAW, PSD, JXL, BMP, ICO and more
How to use Channel Splitter
- 1
Drop your images, choose files, or paste from the clipboard.
- 2
Adjust the options.
- 3
Click Split channels. Files are processed on your device.
- 4
Download each result or everything as a ZIP.
Why use Aback Images for channel splitter
Every channel separately
Red, green and blue as greyscale images, plus alpha when the image has any transparency.
Exact values
Each channel is saved as a greyscale PNG, so its values are kept exactly for masks and texture work.
Batch friendly
Split a folder of textures at once and download every channel as a ZIP.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
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Frequently asked questions
What do I download?
One greyscale PNG per channel, named with -red, -green and -blue, plus -alpha when the image has transparency. Download them one by one or all together as a ZIP. For animations, the first frame is split.
Why are the channels PNG files?
A channel is data as much as a picture. Greyscale PNG keeps every value exactly, which matters when it becomes a mask or a texture.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.