Grayscale image
This tool redraws every pixel with equal red, green, and blue luminance while preserving dimensions. The complete operation runs in temporary browser memory, so the input is never uploaded or stored by LocalKit.
The input stays available if you need to adjust a setting.
How to use grayscale image
- 1
Add the source values or files shown in the workbench.
- 2
Choose the settings for grayscale image.
- 3
Run the tool, inspect the local result, then copy or download it.
A realistic example
Turn a colorful headshot into a monochrome profile image without changing its size. The source and generated result remain in this browser tab throughout the operation.
Supported formats and limits
Input: JPG, PNG, WebP. Output: PNG.
- Perceptual grayscale is an approximation based on standard luminance weights.
- Available memory and browser limits still apply to very large inputs.
Questions people ask
What does grayscale image change?
This tool redraws every pixel with equal red, green, and blue luminance while preserving dimensions.
Is any input sent to a server?
No. LocalKit performs this operation in your current browser tab.