Image Grayscale Converter
Black and white images suit documents, printing and artistic photos. This tool converts colors to shades of gray using perceived brightness, and a strength slider lets you keep a hint of color.
Files are processed in your browser and are not uploaded to our server.
How to Use This Tool
- Choose an image. The tool converts it right away.
- Drag the strength slider below 100 percent if you want a muted color look.
- Download the result.
Why Use ToolVigo's Image Grayscale Converter
- Uses the standard luminance weights for natural-looking gray tones.
- Strength slider from full color to full black and white.
- Live preview as you adjust.
Supported Formats
JPG/JPEG, PNG and WebP images up to 25 MB. Other formats depend on what your browser can open.
Privacy & Security
This tool runs entirely in your browser using the Canvas API. Your image is never uploaded to ToolVigo's servers and nothing is stored after you close the page.
Frequently Asked Questions
Does grayscale reduce file size?
Sometimes slightly, but not always. Most formats still store the image as color data, so the file may stay about the same size.
Which formula is used?
Gray equals 0.299 times red plus 0.587 times green plus 0.114 times blue, which weights green highest because the eye is most sensitive to it.