Know your formats
Supported formats and limitations
Accepted formats are checked from file contents. Native browser codec support is required. Only still images are supported.
- Input formats
- JPGPNGWEBP
- Output formats
- JPGPNGWEBP
- Color is removed from the exported pixels and cannot be recovered from that copy.
- Grayscale pixels do not guarantee a smaller file or a single-channel image encoding.
Grayscale changes the subject to weighted shades of gray while retaining its dimensions. PNG and WebP keep supported alpha. For JPEG, the chosen opaque background is applied after the grayscale operation and can remain colored. The tool does not apply a two-color threshold.
Limits: 16 MiB per file, 8192px per edge, 8 megapixels. Batch input is limited to 8 files / 32 MiB, and retained batch outputs to 64 MiB. Metadata is discarded; color profiles and HDR may change.
A local workflow
How to use this converter
Your file contents stay in the browser as you work.
Choose a color image.
Preview the documented grayscale transformation.
Export a supported image format.
A little more clarity
Frequently asked questions
Will the result be pure black and white?
Grayscale includes intermediate shades of gray. A two-color threshold effect is a different operation.
Is Image Grayscale available now?
This tool runs locally with JavaScript enabled. Check its supported formats and size limits before converting.