⚫ Grayscale Converter
Drag and drop an image, or click to select one
Convert an uploaded image to grayscale. Choose from three conversion methods: "luminosity" (weighted for human eye sensitivity), "average" (a simple mean of the RGB values), or "lightness" (the midpoint between the max and min channel values). Useful for a retro photo effect or previewing how an image will look in black and white before printing.
How to use
- Drag and drop an image, or click to select a file.
- Choose a conversion method (luminosity, average, or lightness).
- Press "Apply" to see a preview, then "Download" to save it.
FAQ
What's the difference between the three methods?
"Luminosity" is a weighted calculation that accounts for the human eye's higher sensitivity to green, giving the most natural-looking result. "Average" takes a simple mean of the RGB values, which can look a bit flat. "Lightness" takes the midpoint between the highest and lowest channel values, which tends to produce stronger contrast.
Not sure which method to pick?
"Luminosity" is recommended if you're unsure — it gives the most natural-looking result in most cases.
Is my uploaded image sent to a server?
No, all processing happens entirely in your browser.