Open Media Toolkit
Images · Edit

Make images black and white

Your files are processed on your device. We never upload them.

HEIC photos are decoded with libheif, under the GNU LGPL. Safari saves WebP with libwebp from jSquash. Browsers that can't read AVIF use libavif from jSquash.

How to make images black and white

  1. 01A ▸Choose your images, or drop them on the page.
  2. 02A ▸Pick black and white or sepia, and move the brightness and contrast sliders.
  3. 03A ▸Select Apply, then download each image, or all of them as a zip.

Questions

How is black and white made?

Each pixel's brightness is worked out the way the eye sees colour, with green counting most and blue least, so skies and skin keep natural tones.

Can I only change brightness or contrast?

Yes. Choose Original colours and move the sliders.

Is transparency kept?

Yes, for PNG and WebP.

Are my images uploaded?

No. Your files are processed on your device. We never upload them.

Which formats work?

JPG, PNG, and WebP keep their format. GIF and BMP come out as PNG, and HEIC and AVIF photos come out as JPG.