How grayscale image works
Make a color photo or graphic grayscale for a restrained visual style, simple proofs or printing previews. Color channels are combined by weighted luminance so green contributes more to perceived brightness than blue. The saved file keeps the original pixel dimensions.
The browser reads every pixel, calculates a brightness value and writes that value into the red, green and blue channels. It then exports a new image. Since the original color cannot be derived from gray pixels, keep the source file if you may want color later.
Steps
- Select a JPG, PNG or WebP image.
- Adjust the available controls for your task.
- Process and download the output. Keep the original as a backup.
Formats and limits
The downloaded file has no recoverable original color information. Input decoding depends on your browser. Files are limited to 25 MB each and 40 megapixels to protect browser memory.
Privacy
The processing code runs locally in your browser. This tool does not upload the selected image to Do The IMG. Avoid sharing downloaded files if they contain sensitive content.
Common questions
Is grayscale the same as a one-bit black-and-white image?
No. It keeps shades between black and white.\nCan I restore the original colors afterward? | Not from the grayscale output alone. Keep your original file.