offlinewebtools.com — free, watermark-free browser tools that stay on your device with nothing uploading to our servers
Grayscale Converter
Convert color images to black and white with professional grayscale conversion
Free to use, no watermarks, runs in your browser—nothing uploads to our servers
Upload Image
Select a color image to convert to grayscale
Drag & drop a file or browse
Supports: image/*
Report a bug
If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.