application/vnd.openxmlformats-officedocument.wordprocessingml.document
The MIME type for modern Word (.docx) — Open XML inside a ZIP wrapper.
Typical extensions
Primary uses
- Modern Word document delivery
- Enterprise system exports
- Cloud Office integrations
In a browser
Downloads by default; Microsoft 365 and Google Docs preview in the browser.
On a server
`Content-Disposition: attachment` clarifies intent for UX.
In email
The standard office attachment today. Template-injection risk remains — keep Protected View on.