About This Tool
The RGB channel viewer shows how the red, green, and blue components are distributed across an image. You can view each channel in its own color or as grayscale intensity.
How to Use
- Choose or drop in an image to start with the original view.
- Select the red, green, or blue channel.
- Switch between channel color and grayscale intensity to inspect the result.
- Select Download Channel PNG to save the processed image at full resolution.
Supported Formats
- PNG, JPG/JPEG, and static WebP images are supported. Choose or drop in one image at a time.
- Files can be up to 100 MiB, 40 million pixels, and 16384 pixels on either side. Large images need more memory, so choose a size that works well on your device.
Understanding the Results
- Channel color keeps only the selected component. For example, the green channel of (255,128,0) is (0,128,0).
- Grayscale intensity copies the selected component to all three channels. The same pixel’s green grayscale value is (128,128,128).
- The result keeps the original alpha, so transparent areas stay transparent. RGB channels are available; there is no separate alpha channel view.
- Downloads are full-size processed PNGs, not screenshots of the preview. Red, green, and blue files are named red-channel.png, green-channel.png, and blue-channel.png.
Original Colors, Channels, and Transparency
- Original mode keeps the image’s colors. Select a channel and display mode to compare its intensity with the original.
- Downloads keep the original dimensions after orientation correction. The PNG file size may differ from the source, so keep your original image.
Privacy
Your images are processed only in your browser and are never uploaded to a server.
The tool does not automatically save your input or results. Copy or download anything you need before clearing or leaving the page, and keep the original image.
FAQ
What is an RGB channel?
RGB images combine red, green, and blue components to represent color. Viewing one channel shows that component’s strength across different parts of the image.
Why does each channel look different?
A pixel’s red, green, and blue values usually differ, so the bright and dark areas vary between channels.
How do channel color and grayscale intensity differ?
Channel color keeps the selected component and sets the other two to zero. Grayscale intensity copies that component to all three RGB components, showing its strength as shades of gray.
Is the alpha channel shown?
There is no separate alpha channel view, but all channel results and PNG downloads preserve the original transparency. Transparent areas are not filled with a solid color.