Image Threshold is a free online tool that converts images (JPEG, PNG, WebP) to black and white or in other words – binary. Simply insert a photo into the app and select a desired binarization threshold value. That’s not all, the software is free to use and has additional nice features, so go ahead and happy thresholding.
Drag and Drop
Click the Browse button to select file from your device.
Press Ctrl+V to paste an image from clipboard.
Use a sample image
About the Image Binarizator
The binarization (or image threshold) is a process that transforms an image into a two-color picture – black and white. This means that each pixel in the image will be 1 (255) for white and 0 for black depending on whether it exceeds a certain threshold value.
This online software is free to use and does not require registration or account. There is no limit to the number of images you will convert.
How to use the Tool
This online image utility has several thresholding options that provide additional functionality and convenience. To get more information on how to extract binary mask from an image or illustration, you can read the following points:
The tool allows to reduce some of the image noise before the binarization process. Use the Smooth slider to control the noise reduction strength.
Manual threshold selection
Use the Threshold slider to control what part of the picture is considered background (black) and what is foreground (white).
Click the Auto Detect button to use the built-in binarization level detector.
Note: Auto detection mode is a rough estimate and may not provide the desired result for the current image.
Select a region of interest
In case you want to apply a binarization effect to a part of your photo, hold down the left mouse button (LMB) and draw a rectangle over the image area.
Image dithering has different application in digital signal processing and algorithms. You can use the build-in Dither algorithms by a simple click on the Dithering button.
Note: For larger images, you may need to save the result to see the actual effect.
The next section shows some sample results from the tool.
Related Image Utilities
Click on a photo below to select a tool.
Free Online Image Tools
Edit photos directly in your web browser for free.