Fine-tune image color channels
Adjust red, green and blue channel strength independently. Processing stays in your browser.
Source image
Drop an image here
PNG, JPEG, WebP or GIF · up to 15 MB
Before and after
Original
Adjusted
The checkerboard reveals transparent areas. Export uses the original image dimensions and preserves alpha.
What this tool does
Change red, green and blue channel levels independently without altering transparency. Use small adjustments to correct a color cast or larger ones for a stylized result.
How to use it
- Choose a PNG, JPEG, WebP or GIF image.
- Move the Red, Green and Blue sliders and compare the live result with the source.
- Download a PNG at the source image dimensions.
Understand the controls
- Positive values
- A positive setting moves that channel toward 255 (white). A negative setting moves it toward 0 (black).
- Channel independence
- Each slider changes only its named channel. The image alpha is preserved.
Example
If a photograph looks too warm, try a small negative Red adjustment or a small positive Blue adjustment, then compare before exporting.
Files and limits
Each channel accepts -100 to +100. One file up to 15 MB, 8192 px per edge and 32 million pixels; GIF uses the first frame. Output is PNG.
Frequently asked questions
What does a negative value do?
It reduces that channel toward black; a positive value raises it toward white.