Free online EXR to WEBM converter

EXR render frames cannot be played directly in most browsers or standard video players, so they are often converted for web playback or sharing. WEBM packages the frames as a video, but conversion also changes EXR’s high-dynamic-range image data into video color and pixel formats.

What the EXR format is

OpenEXR (EXR) is a high-dynamic-range image format used in visual effects, animation, and 3D rendering. Renderers and compositing tools such as Blender, Houdini, Nuke, and Maya can create EXR files. A project may contain one EXR still or a numbered sequence of frames; an EXR file itself is not necessarily a video.

What the WEBM format is

WEBM is a video container commonly used for browser playback and web sharing. It typically contains VP8 or VP9 video, which can produce smaller files than uncompressed image sequences. It is useful when the recipient needs a playable clip rather than individual render frames.

How to convert EXR to WEBM

Online on 101convert.com

1. Upload the EXR image or images to the converter on this page. Multiple files can be processed in one batch; the page shows the per-file size limit.
2. Set show each picture for to choose how long each picture is displayed.
3. Start the conversion, then download the resulting WEBM file or files.

Offline with desktop software

FFmpeg is a free, open-source command-line option for Windows, macOS, and Linux. For a numbered sequence such as frame_0001.exr, frame_0002.exr, and so on, run:

ffmpeg -framerate 24 -start_number 1 -i frame_%04d.exr -c:v libvpx-vp9 -pix_fmt yuv420p -crf 30 -b:v 0 output.webm

Change 24 to the intended frame rate, 1 to the sequence’s first frame number, and frame_%04d.exr to match the filenames. The FFmpeg build must include the EXR decoder and VP9 encoder. A single EXR still produces only one frame unless you extend or loop it.

Blender is a free, open-source option for Windows, macOS, and Linux. In the Video Sequencer, use Add → Image/Sequence to load the EXR frames in order. In Output Properties, set the frame rate and range, choose File Format → FFmpeg Video, then set the encoding container to WebM and the video codec to VP9. Set the output path and use Render → Render Animation.

Quality and compatibility

EXR can store linear, high-precision HDR values and extra render channels; a typical WEBM encode is a lossy video with fewer channels and often 8-bit 4:2:0 color. Tone-map and color-manage HDR frames for the intended display before encoding, then check the result for clipped highlights or shifted colors. VP9 WebM can support transparency in some workflows, but playback support varies; the FFmpeg command above does not preserve alpha.