Convert Images to Grayscale (Black & White)
Convert any image to black and white.
Drag & drop files here
or click to browse · .jpg, .jpeg, .png, .webp, .gif, .tiff, .bmp, .avif, .heic
About Grayscale Image
Transform your colour photographs into striking black and white images with a single click. CocoConvert's grayscale filter uses perceptual luminance weighting — the same formula used by professional photo editors — to produce natural-looking monochrome results that preserve depth and contrast.
This is more than a simple desaturation. The algorithm weights the red, green, and blue channels according to how the human eye perceives brightness (0.2126R + 0.7152G + 0.0722B), producing images with rich tonal range rather than flat, washed-out greys.
Batch processing on the Pro plan means you can convert an entire gallery of up to 100 colour photos to black and white in one go — great for creating a consistent aesthetic for a portfolio, printing project, or social media campaign.
Resolution, aspect ratio, and metadata are fully preserved. Works with JPG, PNG, WebP, GIF, TIFF, BMP, AVIF, and HEIC formats.
Supported Formats
How to Use
Upload your image
Drag and drop your colour image. All major formats are supported.
No settings needed
The grayscale conversion is automatic — no parameters to configure.
Click "Grayscale Image"
CocoConvert converts your image using perceptual luminance weighting.
Download the B&W image
Your grayscale image is ready. Original quality and resolution are preserved.
Frequently Asked Questions
Is this the same as desaturation?
No. Simple desaturation sets saturation to zero, which can look flat. CocoConvert uses perceptual luminance weighting to produce rich, natural black and white images with proper tonal depth.
Can I adjust the contrast?
The current grayscale tool applies a faithful luminance conversion. For contrast adjustments, convert to grayscale then use a photo editor for fine-tuning.
Does it preserve transparency?
Yes. For PNG and WebP files with transparency, the alpha channel is fully preserved.
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