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Convert EXR to WBMP - HDR Images to Monochrome Bitmap

Transform OpenEXR renders into compact 1-bit wireless bitmap images.

Step 1: Upload your files

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Step 2: Choose format
Step 3: Convert files

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Why Convert EXR to WBMP?

EXR files store cinema-grade high dynamic range imagery with 16-bit or 32-bit floating point precision per channel. WBMP is the exact opposite: a 1-bit monochrome format designed for early mobile devices with minimal bandwidth and processing power.

While this conversion might seem unusual, there are specific scenarios where reducing professional EXR renders to WBMP makes sense: creating simplified previews for legacy systems, generating monochrome graphics from HDR source material, or building assets for retro-style applications that require strict 1-bit imagery.

How to Convert EXR to WBMP

  1. Upload your EXR file - Select your OpenEXR image from your computer or drag it into the converter
  2. Confirm WBMP output - The converter will process your high dynamic range data into black and white pixels
  3. Download your WBMP - Get your converted monochrome bitmap instantly

The entire conversion happens in your browser. No software installation required.

Understanding the Technical Difference

These two formats represent opposite ends of the image format spectrum:

  • EXR (OpenEXR) - Created by Industrial Light & Magic for professional visual effects. Supports 30+ f-stops of dynamic range, multiple channels, layer data, and floating-point precision. A single frame can be hundreds of megabytes.
  • WBMP (Wireless Bitmap) - Designed for WAP phones in the early 2000s. Strictly 1-bit: each pixel is either black (0) or white (1). No compression, no grayscale, no color. An 8x8 pixel image uses just 8 bytes.

In our testing, the conversion applies thresholding to determine which pixels become black and which become white. Properly exposed EXR images with good contrast convert more predictably than extremely dark or bright renders.

When This Conversion Makes Sense

Retro and Pixel Art Projects

If you're rendering 3D scenes in EXR for a project that requires 1-bit aesthetic output, converting to WBMP strips away all color and grayscale information to give you pure black and white results.

Legacy System Integration

Some specialized industrial or embedded systems still use WBMP for display. Converting from EXR lets you generate these assets from modern rendering pipelines.

Extreme File Size Reduction

When you need the absolute smallest possible file from an EXR source, WBMP delivers. There's no smaller format than 1 bit per pixel with no compression overhead.

Better Alternatives for Most Users

If you don't specifically need WBMP, other formats preserve more of your EXR data:

  • EXR to PNG - Keeps grayscale and color with lossless compression
  • EXR to JPG - Smaller files with full color, good for web sharing
  • EXR to TIFF - Professional format that maintains higher bit depth

WBMP should only be your target when monochrome 1-bit output is specifically required.

Works in Any Browser

Our EXR to WBMP converter runs entirely in your web browser:

  • Windows, Mac, Linux, Chromebook
  • Chrome, Firefox, Safari, Edge
  • No plugins or downloads needed

Your EXR files are processed locally and never uploaded to external servers.

Pro Tip

Before converting, adjust your EXR exposure and contrast in compositing software to maximize the luminance separation between elements you want as black versus white. The thresholding process works best with clearly defined tonal boundaries.

Common Mistake

Converting EXR files with subtle gradients or low contrast expecting usable results. WBMP eliminates all nuance - if your source image relies on smooth tonal transitions, the 1-bit output will look harsh and lose detail.

Best For

Generating stark black and white graphics from professional 3D renders for retro-style games, legacy display systems, or artistic projects that specifically require 1-bit monochrome output.

Not Recommended

General image sharing or archiving. WBMP destroys virtually all image data from EXR files. For any purpose besides strict 1-bit requirements, use PNG, JPG, or TIFF instead.

Frequently Asked Questions

EXR (OpenEXR) is a high dynamic range image format created by Industrial Light & Magic for professional visual effects work. It stores images with 16-bit or 32-bit floating-point precision, supporting over 30 f-stops of dynamic range and multiple image channels in a single file.

WBMP (Wireless Application Protocol Bitmap) is a monochrome image format designed for early mobile phones. Each pixel can only be black or white (1-bit), making files extremely small but limited to two-color output with no grayscale.

Yes, significantly. EXR files contain millions of colors and extensive dynamic range. WBMP reduces everything to pure black or white pixels. This conversion is only appropriate when 1-bit monochrome output is your specific requirement.

The conversion applies thresholding based on pixel luminance. Pixels above a certain brightness become white, and those below become black. Images with good contrast and clear subject separation produce the best results.

No. WBMP is strictly a 1-bit format supporting only black and white. There are no color, grayscale, or transparency options. Each pixel uses exactly 1 bit of data.

Specific use cases include: retro-style projects requiring 1-bit aesthetics, legacy embedded systems that only accept WBMP, creating simplified preview images, or artistic projects that deliberately reduce complex renders to stark black and white.

For most purposes, convert EXR to PNG (lossless with full color), JPG (smaller files for sharing), or TIFF (professional use with higher bit depth). Only use WBMP when 1-bit monochrome is specifically required.

WBMP has largely been replaced by modern formats like PNG and JPEG. It was designed for early WAP phones with limited bandwidth and processing power. Today it is mostly used for legacy systems, specialized industrial displays, or retro aesthetic projects.

No. Our converter runs entirely in your web browser. Upload your EXR file, convert to WBMP, and download the result. No software installation, plugins, or account required.

Dramatically smaller. A single EXR frame can be hundreds of megabytes with floating-point data. The same image as WBMP uses 1 bit per pixel with minimal header data. An 800x600 WBMP would be roughly 60KB compared to potentially 50MB+ for an uncompressed EXR.

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