A Microsoft PowerPoint presentation in the Office Open XML format.
| 0x00000000 | 504B0304 | PK·· | 'PK' — it is a ZIP |
Inside the ZIP: '[Content_Types].xml' plus a 'ppt/' directory.
A .pptx is a ZIP archive of XML parts describing slides, layouts and media, replacing the binary .ppt. It is recognized by '[Content_Types].xml' plus a 'ppt/' folder inside the ZIP.
Have a file that might be PowerPoint presentation (pptx)? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.