Grayscale Image
Remove all color information from an image to create a black and white version.
FREE - NO SIGN-UP - RUNS ON YOUR DEVICE
Your files stay on your device
- Colorto B&W
- JPG, PNGformats
- Alphapreserved
- Instantconversion
Grayscale Image at a glance
- Input formats
- JPG, PNG, WEBP, BMP, GIF
- Output formats
- Same as input
- Maximum file size
- Device memory
- Batch
- Single image only
- Quality control
- Luminance formula applied
- Metadata handling
- Verify output
- Price
- Free
- Account required
- No
How to use Grayscale Image
- 1
Add Your Image
Add your color image.
- 2
Review the Result
Review the grayscale preview.
- 3
Download the Image
Download the B&W image.
Frequently asked questions
Can I control the black and white conversion?
This tool provides a direct conversion to grayscale. It does not include controls for contrast, brightness, or specific color channel mixing.
Does this reduce the file size?
It can. Removing color data can sometimes result in a smaller file, especially for formats like PNG, but this is not guaranteed for all images.
What happens if I use a transparent PNG?
Transparency is preserved. Only the color pixels are converted to grayscale, while transparent areas of the image remain transparent.
How Grayscale Conversion Works
This tool converts each color pixel to a shade of gray using a standard luminance formula. Any transparency in the original image is retained.
- Grayscale conversion calculates the perceived brightness (luminance) of each pixel. Different colours contribute differently; green appears brighter to the eye than blue.
- This tool weights the red, green, and blue values of each pixel. This creates a more natural black and white image.
Full specification
| Input formats | JPG, PNG, WEBP, BMP, GIF |
|---|---|
| Output formats | Same as input format |
| Maximum file size | Limited only by your device memory |
| Batch | No, one source image per run |
| Quality control | Luminance formula applied to each decoded pixel |
| Metadata handling | Verify against generated output |
| Price | Free |
| Account required | No |
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