magicnumbers

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50 4B 03 04

ZIP archive

category
file-signature
normalized
504b0304
confirmed
2026-05-06
lookups
1
source
https://en.wikipedia.org/wiki/List_of_file_signatures

Local file header signature of a ZIP archive โ€” "PK" after Phil Katz. Also the container signature of DOCX/XLSX/JAR/APK and other ZIP-based formats.

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50 4B 03 04 0A 00 02 00 Open Publication Structure eBook file-signature
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50 4B 03 04 14 00 06 00 MS Office 2007 documents file-signature
50 4B 05 06 PKZIP archive file-signature