Image compressor
Reduce image dimensions and encode a smaller WebP or JPEG, with an exact before-and-after size comparison.
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Image tools
Grayscale image
Turn an image into grayscale using weighted RGB luminance.
Free to useProcessed on your device
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About this tool
Turn an image into grayscale using weighted RGB luminance.
How to use
- Choose the local file you want to process.
- Set the available options, then run the tool.
- Inspect the result and download the output. Your original file is unchanged.
Processing happens in this browser. Your file is not uploaded. Keep the original file until you have checked the result.
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