Grayscale Image Converter
Convert a photo to black and white — instantly in your browser.
No upload No signup Works in browser Free
Drop your file here
or click to browse — nothing is uploaded
How to use
- 1Drop an image or click to browse your files.
- 2Click "Convert to grayscale".
- 3Download the black-and-white image.
Grayscale Image — why it works this way
Grayscale conversion is useful for print, design mockups, or a classic look. This tool computes real luminance-weighted grayscale (not just desaturation) using the Canvas API, entirely on your device.
Is my file uploaded? No. Everything happens locally in your browser using the Canvas/File APIs — your file is never sent anywhere.
FAQs
Is my image uploaded anywhere?+
No. Conversion happens entirely in your browser using the Canvas API.
How is grayscale calculated?+
Using the standard luminance formula (weighting green highest, blue lowest) for a natural-looking result.