Convert Image to Grayscale — Free, Instant
100% Private — files never leave your device
Drop images here
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Supports: JPG, PNG, WebP
Convert Images to Black and White
Vizua converts color images to grayscale using the perceptual luminance formula, which weights red, green, and blue channels according to how the human eye perceives brightness. The result is a natural-looking black and white image.
Use Cases
- Photography — create dramatic black and white versions of your photos
- Design — prepare images for monochrome layouts or printing
- Documents — reduce visual complexity for scanning or archiving
100% Private
Your images are processed entirely in your browser. No files are uploaded to any server.
Frequently Asked Questions
How does grayscale conversion work?
Vizua converts each pixel using the luminance formula (0.299R + 0.587G + 0.114B), which matches human perception of brightness. This produces natural-looking black and white images.
Can I convert multiple images at once?
Yes — drop multiple files and download them all individually or as a ZIP archive.
Is the conversion lossless?
The grayscale transformation itself is precise, but the output is saved as JPEG (92% quality) or PNG depending on the input format. PNG outputs are lossless.