About this tool
Convert any image to black and white or grayscale. Useful for preparing images for monochrome printing (cheaper), creating artistic or classic versions of photos, standardising images for a document with uniform aesthetic, or simply seeing how an image looks without color.
How to use
- Upload the image.
- See the preview of the grayscale version.
- Download the result in the same format as the source.
Frequently asked questions
- Is there a difference between black and white and grayscale?
- Yes. "Grayscale" keeps a full scale of values (from black to white through all intermediate grays), preserving luminosity. "Pure black and white" reduces to only two colors (black or white), producing a high-contrast silhouette effect. Most tools that say "black and white" actually produce grayscale.
- How is gray calculated from color?
- By a weighted average of the red, green, and blue channels, with weights approximating human perception of brightness (about 30% R, 59% G, 11% B). This formula makes greens look lighter and blues darker than a simple average would, reflecting how the human eye perceives brightness.
- Can I adjust the conversion tone (lighter, darker)?
- This tool uses the standard conversion. For brightness or contrast adjustments after conversion, open the result in a dedicated image editor. For artistic effects like sepia (brown tone), use specific filters in other tools.