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Grayscale Converter

Turn any color image into a black and white photo — instantly, and privately.

Convert an image to grayscale

Click or drop an image here

Image: —
Pixels are converted on a local canvas; the image never leaves your device.

How to use the Grayscale Converter

  1. Drop an image into the box or click it to pick a file.
  2. Choose a conversion method and drag the strength slider if you want a partial effect.
  3. Click Download to save the black and white image.

Features

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Frequently Asked Questions

Common questions about the free online grayscale converter.

Drop your image into the box and it turns black and white straight away. Use the strength slider if you only want a partial effect.
The default Luminance method uses the Rec. 709 weights, which match how the human eye perceives brightness and give the most natural result.
Average takes a simple mean of the red, green and blue channels, while Lightness uses the midpoint between the brightest and darkest channel.
No. Everything is processed with the canvas API inside your browser, so nothing is sent anywhere.
The pixel count stays the same, so nothing is blurred. You only lose the color information, and saving as PNG keeps the result lossless.
Yes. Keep the strength at 100 percent for a full black and white conversion, or lower it to blend the grayscale version with the original colors.
You can download the result as PNG, JPEG or WebP, with a quality slider for the two compressed formats.
No. Grayscale conversion discards the color channels, so keep a copy of the original if you may need it later.
Yes, the converter is fully responsive and works in any modern mobile browser.
Yes, it is completely free with no account and no watermark.

Last updated: October 10, 2026