Free online EXR to BMP converter

A BMP copy is useful when a Windows utility, legacy application, printer workflow, or basic image editor cannot open OpenEXR. Conversion also produces a broadly compatible raster image for sharing, although it usually reduces HDR and floating-point data to 8-bit color.

What the EXR format is

OpenEXR is an HDR image format developed for visual-effects, animation, rendering, and compositing workflows. It can store 16-bit half-float or 32-bit floating-point channels, linear-light data, high dynamic range, alpha, multiple channels, and multilayer images.

Renderers and applications such as Blender, Autodesk Maya, Houdini, Cinema 4D, Arnold, V-Ray, RenderMan, Nuke, and other OpenEXR-compatible tools commonly create EXR files. You encounter them as rendered frames, compositing passes, environment maps, and intermediate production files rather than ordinary camera or web images.

What the BMP format is

BMP is a raster format supported by Windows, older desktop software, embedded systems, and many simple imaging tools. Standard BMP files are usually uncompressed and store 24-bit RGB or 32-bit RGBA pixels; some variants support indexed color or other bit depths.

BMP is useful when compatibility matters more than file size, metadata, HDR range, or advanced color management. Its uncompressed pixel data makes files larger than PNG or JPEG, but it avoids dependence on specialized EXR support.

How to actually convert EXR to BMP

Using ImageMagick

ImageMagick is suitable for command-line conversion and batch processing. Install a build with OpenEXR support, then run:

magick input.exr -colorspace sRGB -depth 8 BMP3:output.bmp

-colorspace sRGB converts linear EXR values to an sRGB display space, and -depth 8 reduces each channel to 8 bits. The BMP3: prefix requests a widely supported BMP variant. Replace the filenames with the actual input and output paths.

For a folder of EXR frames on Windows PowerShell, use:

Get-ChildItem *.exr | ForEach-Object { magick $_.FullName -colorspace sRGB -depth 8 ('{0}.bmp' -f $_.BaseName) }

For a folder on macOS or Linux, use:

for f in *.exr; do magick "$f" -colorspace sRGB -depth 8 "${f%.exr}.bmp"; done

Using desktop software

In GIMP, open the file with File → Open, then use File → Export As, choose a filename ending in .bmp, select the desired BMP options, and confirm the export. Blender can open an EXR in the Image Editor and save it through Image → Save As after setting the render or image color-management options.

Converting without installing software

You can convert the file for free on 101convert.com: select the EXR-to-BMP converter, upload the EXR, start the conversion, and download the resulting BMP.

Quality and compatibility limits

BMP cannot retain the full HDR range, floating-point precision, multilayer structure, or arbitrary EXR channel set. An EXR with several render passes is normally reduced to the displayed RGB image; choose the required layer or pass before exporting.

Bright highlights can clip during 8-bit conversion. If the result is too dark or highlights are lost, apply exposure and tone mapping before export in Blender, Nuke, ImageMagick, or another color-managed application. Alpha may be written as a 32-bit BMP channel, but many Windows viewers ignore BMP transparency; use PNG when transparent output must work reliably.