Free local-processing tool
Grayscale Image Converter
Convert colored images into neutral grayscale while retaining brightness detail.
Settings and export
Select an image to start.
Files stay on this device. No login, server image upload or hidden paid API is used.
How to use Grayscale Image Converter
- Select a compatible image saved on your device.
- Review the preview and settings. Try a smaller image if your device has limited memory.
- Choose Process locally, inspect the output and download the result.
What this tool does
Export monochrome artwork, document scans and product previews without re-encoding the original file.
Useful limitations
Grayscale does not improve resolution or restore lost contrast. Transparent alpha is kept; animation becomes one frame. Browser decode support and color profiles vary, and local device memory limits apply. For animation, only one still frame is used.
Privacy and compatibility
The selected file is read locally with browser APIs. It is not sent to this website’s server. Outputs are generated locally; some exports become PNG, text/JSON or single-page PDF according to the tool. Keep an unedited original and check the result carefully.
See supported formats, privacy details and the complete tool directory.