A ZIP archive — also the container format underlying docx/xlsx/pptx, jar, apk and epub.
| 0x00000000 | 504B0304 | PK·· | 'PK' local-file header |
ZIP is the most widely used general archive format and, crucially, the container behind a whole family of formats (Office documents, Java JARs, Android APKs, EPUB books). A local file entry begins with 'PK' followed by 03 04.
Have a file that might be ZIP? Identify it with the File Type Identifier — it reads the magic number locally, nothing is uploaded. Or browse all formats.