ClarityHow to use Grayscale Image
- Choose a supported file using the file picker or drag and drop.
- Set output format.
- Select Process, review the result, and download it.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Output format | Choose PNG — lossless / JPEG — smaller photos / WebP — modern browsers. | PNG — lossless |
Check your output before using it
- Check contrast after removing color, especially charts that distinguish categories by color alone.
The method, explained
Each pixel receives luminance calculated as 0.2126R + 0.7152G + 0.0722B. Alpha is preserved in PNG.
Turn a colored chart into a grayscale version to inspect tonal differences.
What to keep in mind
JPG, PNG and WebP inputs only, up to 20 MB total and 24 million decoded pixels per image. Animated files are treated as still images. JPEG uses a white background for transparency. Output size may increase; review the preview and size.
Common questions
Are my files uploaded?
No. This tool processes files in your browser. Files are not sent to ClarityKit or an external API. Reset the tool or close the tab to release the working files.
What should I do if processing fails?
Check the supported formats and limits above. Try a smaller, unencrypted file and keep the tab open until the result is ready.
Built and checked by ClarityKit. File privacy · Open-source notices