Threshold Image Online
Convert images to pure black and white using threshold adjustment. Perfect for creating high-contrast images, document scanning, and artistic effects. Supports JPG, PNG, GIF, and more formats.
or drop images here
Convert images to pure black and white using threshold adjustment. Perfect for creating high-contrast images, document scanning, and artistic effects. Supports JPG, PNG, GIF, and more formats.
or drop images here
Image thresholding is a simple yet effective method for image segmentation that converts a grayscale or color image into a binary (black and white) image. By setting a threshold value, pixels darker than the threshold become black, while lighter pixels become white.
Our tool analyzes each pixel in your image and compares its brightness value to the threshold you set. Values below the threshold are converted to pure black (0), while values above become pure white (255). This creates high-contrast images perfect for document scanning and artistic effects.
Threshold conversion is ideal for preparing documents for OCR (text recognition), creating stencils and silhouettes, processing scanned documents, generating QR codes, and creating dramatic black and white artistic effects.
Our threshold tool supports all major image formats including JPEG, PNG, GIF, BMP, and WebP. The tool processes images directly in your browser for maximum privacy and speed, with no server uploads required.
For documents, try threshold values between 120-140. For photos with good contrast, values around 128 (middle) often work well. For darker images, use lower threshold values (80-120), and for lighter images, use higher values (140-200).
All image processing happens directly in your browser using advanced web technologies. Your images are never uploaded to our servers, ensuring complete privacy and security. The processed images are yours to download and use freely.