PixelForge
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PixelForgeConvert Images to Grayscale in Bulk
Convert hundreds of color photos to black and white in one batch. No settings needed — just upload and process.
1. Upload images
Drop images here or click to browse
JPEG, PNG, WebP, GIF, TIFF, AVIF — up to 10 files, 20 MB total
2. Configure settings
All images will be converted to grayscale (black and white). No additional settings required.
Free plan: up to 10 images per batch. Upgrade for more.
What this tool does
Transform your entire photo library to grayscale in seconds. PixelForge's bulk grayscale converter uses Sharp's high-quality color-to-luminance conversion to produce clean, professional black-and-white images. Ideal for photographers, designers, and anyone preparing images for print or editorial use.
Problems it solves
- Converting a portfolio of color photos to black and white for a print project
- Creating grayscale versions of product images for a monochrome design
- Preparing editorial photos in grayscale for publication
- Converting color screenshots to grayscale for documentation
Example
Convert 300 color portrait photos to black and white
Frequently asked questions
Does converting to grayscale reduce file size?
Yes, slightly — grayscale images have less color information, which means they compress more efficiently. The reduction is more noticeable in WebP and JPEG than PNG.
Is this conversion reversible?
No — once color information is removed, it cannot be recovered from the output file. Keep your original color images if you may need them later.
Can I convert to grayscale and compress at the same time?
Yes — add both a Grayscale and Compress operation in the workspace. Operations are applied in order.
What algorithm is used for the conversion?
PixelForge uses Sharp's standard perceptual grayscale conversion, which weights the red, green, and blue channels according to human visual sensitivity (ITU-R BT.709 luminance coefficients). This produces natural-looking black-and-white results.
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