PixelForge
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PixelForgeConvert Images to Black and White Online in Bulk
Convert images to pure black and white (1-bit) in bulk. Perfect for logos, line art, documents, and print.
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
Pixels darker than this value become black; lighter pixels become white. Lower values keep more white area; higher values keep more black.
Free plan: up to 10 images per batch. Upgrade for more.
What this tool does
Unlike grayscale (which produces a range of grey tones), threshold conversion reduces every pixel to either pure black or pure white — creating crisp, high-contrast images ideal for logos, QR codes, line drawings, scanned documents, and printing on non-grey-capable printers. Adjust the threshold value to control where the cut-off falls between black and white.
Problems it solves
- Preparing logo files for single-color screen printing or embroidery
- Converting scanned handwritten notes or documents to clean black and white
- Creating high-contrast silhouette images for print or cutting machines
- Reducing file size by converting grey images to true 1-bit black and white
Example
Convert 100 scanned document pages to clean black and white for archiving
Frequently asked questions
What is the difference between black and white and grayscale?
Grayscale images have a full range of grey tones between pure black and pure white. Black and white (threshold) images have only two values — each pixel is either fully black or fully white, with no grey. The result is a high-contrast, graphic appearance.
What threshold value should I use?
128 (the midpoint) is the default and works well for most images. Increase the value toward 255 to make more pixels black (darker result). Decrease toward 0 to make more pixels white (lighter result). For scanned text, 150–180 often produces the cleanest output.
What is this useful for?
Common uses: preparing logos for single-color printing, screen printing, or laser engraving; converting scanned documents for OCR; creating silhouettes; reducing file size for large document archives.
Is this the same as the Grayscale tool?
No. The Grayscale tool desaturates colors while keeping all tonal values (producing a grey-toned image). This tool applies a hard threshold — every pixel becomes either pure black or pure white.
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