The biomechanics standard


6 November, 2016

The C3D web site is maintained by Motion Lab Systems as a resource for the biomechanics community.

All of the C3D information on this web site is in the public domain and may be copied and freely distributed with other products. The C3D User Manual documenting the C3D format and structure may be copied and supplied with any product that supports C3D.

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C3D Files supported

The websites listed above all offer products that support C3D files. Please contact us if your product supports the C3D format to request that your website be added to this list.

Disclosure Statement

This site is maintained by Edmund Cramp as a service to the Gait and Biomechanics Community. Motion Lab Systems provides bandwidth and server space for the C3D.ORG web site at no charge. This site exists to provide information about the C3D file format.

In the interests of full disclosure - I work for, and am a major shareholder in, Motion Lab Systems which manufacturers and markets electromyography systems and other items for the biomechanics and clinical gait market. These include C3D software applications that support, and provide access to, data stored using the C3D format. I have been working with C3D files since 1987.


All textual information and documentation available from this web site is public domain - this policy does not automatically apply to software applications and documentation downloaded from this web site unless specifically mentioned by the documentation or software application.

Privacy Policy

This web site does not scripts or cookies - it does not read or write any information to your browser or computer system. All data transfers are limited to those initiated by the user (such as reading a web page or downloading a file).

In common with most web sites, we maintain log that record all pages visited and any errors that are encountered. We do not use this information to locate individual users except in the case of abuse or deliberate attempts to hack into this site.


Prior to establishing Motion Lab Systems, I worked for the Oxford Instruments group in the UK and USA (1974-1984) and then Oxford Metrics Ltd., (1984-1998) in the USA. I worked with Graham Klyne and Julian Morris to provide installation and support for the early Vicon gait and motion capture laboratories in the United States and eventually ran Oxford Metrics Inc., the US subsidiary now called Vicon Motion Systems, until 1997. In the sixteen years that I spent with Vicon, I set up, installed and supported more than sixty Gait and Motion Analysis labs worldwide and simultaneously established Motion Lab Systems, Inc., as one of the leading manufacturers of multi-channel electromyographic (EMG) systems for the gait and biomechanics markets.

I registered the C3D.ORG web site in 1998 to support the C3D file format and published the first version of C3D User Guide, describing the C3D format in Oct, 2001.