Grayscale Image
Convert color photos to black and white instantly. Choose from 4 conversion meth...Convert color photos to black and white instantly. Choose from 4 conversion methods. Free, private, no upload.
What You Can Do
Why Use Grayscale Image?
4 Conversion Methods
Luminosity (recommended), Average, Lightness, and Desaturation. Each produces a different look.
Instant Preview
See the grayscale result immediately as you switch methods. No waiting, no convert button.
Nothing Uploaded
Your photos never leave your device. Everything runs in your browser using Canvas API.
Luminosity Recommended
Uses human eye perception weighting (R×0.299 + G×0.587 + B×0.114) for the most natural result.
Clear Before/After
Large comparison thumbnails show your original colors vs grayscale result side by side.
Works on Mobile
Fully responsive interface. Floating download button stays accessible while you adjust.
Popular Uses
Portrait Photography
Create timeless black and white portraits with the Luminosity method.
Document Scanning
Convert color scans to grayscale for smaller file sizes and cleaner prints.
Artistic Effects
Try different methods for various artistic black and white looks.
Print Preparation
Prepare images for black and white printing to save ink costs.
How It Works
Upload Your Photo
Drag an image onto the upload area or tap to browse. Works with PNG, JPG, GIF, WebP, and most formats.
Choose a Method
Select from 4 grayscale conversion methods. Luminosity is recommended for photos. Try others for different artistic effects.
Download Your Result
Hit Download to save as PNG. The filename includes the method used (e.g., photo-grayscale-luminosity.png).
Quick Tips
Start with Luminosity
For photos of people, nature, or everyday scenes, Luminosity produces the most natural-looking grayscale.
Try All Methods
Each method produces a subtly different result. Switching is instant, so experiment to find your preferred look.
Keep Your Original
Grayscale conversion is permanent. Always save a copy of your color original before converting.