Word Web App has a file size limit of 50 MB Content provided by Microsoft Applies to: Word Web App Select Product Version All Products Symptoms You cannot open or edit a document that is larger than 50 MB in Microsoft Word Web App. Cause This behavior occurs because Word Web App has a file size limit of 50 MB. Status This behavior is by design. Last Updated: 30 Sep 2015 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.