ON-DEVICE GRAPHICS
Image Grayscale
Convert a local image to grayscale PNG. Files stay in this browser tab.
Make a grayscale PNG from a local image
How to use this tool
Choose a file from your device and run the tool. Canvas calculates a luminance value for each pixel from its red, green and blue channels and leaves transparency unchanged. Download the new PNG and compare it with the original at full size before using it in a design.
Check the result
The browser re-encodes the image, so embedded camera metadata may not survive. The tool does not offer advanced color profile conversion, duotone controls or professional print proofing. Files are limited to 25 MB and canvas dimensions to 4096 pixels per side.
About Image Grayscale
Convert a local image to grayscale PNG.
How to use it
Choose a file from your device and run the tool. Canvas calculates a luminance value for each pixel from its red, green and blue channels and leaves transparency unchanged. Download the new PNG and compare it with the original at full size before using it in a design.
Before you use the result
The browser re-encodes the image, so embedded camera metadata may not survive. The tool does not offer advanced color profile conversion, duotone controls or professional print proofing. Files are limited to 25 MB and canvas dimensions to 4096 pixels per side.
Frequently asked questions
Can I save my result?
Run the tool, then use its download control. Text results can be saved as a file; image and audio tools show their available export links after generation. A disabled download means a new result is needed.
Are my inputs uploaded?
The tool processes your input in this browser tab. Opening the page downloads the site assets; your tool inputs are not sent to a processing server. Save your result before closing the tab.
How do I start again?
Use Restore example to reset the editable fields, then run the tool again. Changing input invalidates the previous export so that you can generate a fresh result.