Threshold Image
Convert your images to pure black and white binary format with adjustable threshold values. Perfect for document scanning, creating high-contrast artwork, and preparing images for text recognition.
or drop images here or paste
Convert your images to pure black and white binary format with adjustable threshold values. Perfect for document scanning, creating high-contrast artwork, and preparing images for text recognition.
or drop images here or paste
Image thresholding converts color or grayscale photos into pure black and white binary images based on a brightness threshold value. Pixels darker than the threshold become completely black (0), while pixels lighter become pure white (255). This binary conversion creates high-contrast images perfect for document scanning, OCR text extraction, barcode reading, and artistic black and white designs.
Upload any JPG, PNG, or WebP image to start threshold processing instantly. Adjust the threshold slider from 0-255 to control the black-white conversion point - lower values (0-100) create darker images with more black areas, medium values (100-155) balance black and white regions, and higher values (155-255) produce lighter images with more white space. Download as PNG for crisp edges and transparency support, or choose WebP for smaller file sizes while maintaining sharp binary contrast.
The optimal threshold value depends on your image content and purpose. For scanned documents with black text on white paper, use 128-180 to remove paper texture while preserving text clarity. For photographs you want to convert to silhouettes or stencils, try 100-140 to capture main subjects while eliminating background details. For high-key artistic effects with minimal black areas, set threshold above 180. For low-key dramatic effects emphasizing shadows, use values below 100.
Apply threshold filter when scanning documents for digital archiving, preparing images for OCR text recognition software, creating stencils and templates for crafts, generating QR codes and barcodes from photos, preparing line art for vinyl cutting machines, creating high-contrast logos from sketches, or processing images for thermal printers and label makers that only print pure black.
Export thresholded images up to full original resolution maintaining crisp black-white edges. PNG format provides lossless quality ideal for documents, text, and graphics requiring perfect clarity. JPEG works for general use with moderate file sizes but may introduce minor artifacts around sharp edges. WebP offers the best balance - 30-50% smaller files than PNG while preserving sharp binary contrast, perfect for web publishing and digital archiving.