Threshold Tool
Convert photos into clean black and white binary images using adjustable thresholds.
Upload an image
Drag & drop or browse
Binarization Settings
Binary Inversion swaps white and black values. Essential for creating stencils from dark subjects.
Use a lower threshold to capture shadow details, and a higher threshold for clean silhouettes.
Threshold Tool — No Uploads Required
The Threshold tool is essential for technical image prep and artistic binarization. It converts any image into a high-contrast 'binary' output (pure black and pure white). By adjusting the threshold value, you control exactly which brightness levels become black and which become white. This is perfect for cleaning up scanned documents, preparing stencils for CNC/Laser cutters, or creating bold graphic art.
Why This Tool Exists
What makes this useful — and why I built it this way.
High-Contrast Binarization: Convert color images into striking black-and-white formats.
Adjustable Threshold: Fine-tune the division level between dark and light pixels.
Clean Edge Isolation: Perfect for vectorizing or stencil preparation.
When You'd Use This
Real situations where this tool saves the day.
Line Art Scanning: Clean up handwritten notes, sketches, and documents to pure black-and-white.
Stencil Creation: Prepare images for screen printing, stencils, or engraving.
Computer Vision Prep: Segment images to prepare objects for shape-detection algorithms.
Using Threshold Tool
It's straightforward — here's how it works.
Upload the image or document you want to binarize.
Move the threshold slider to find the perfect cutoff point.
Check the 'Invert' box if you need light areas to be black.
Download the results as a high-fidelity PNG.
Questions People Ask
Honest answers about how this works.
Is this good for cleaning up pencil sketches?
Short answer: Yes! It's the best way to turn a rough pencil sketch into a clean black-and-white ink-style line drawing.
What format is the output?
We use high-bit-depth PNG to ensure that the black and white edges remain sharp and uncompressed.
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