---
type: lookup
id: class-ca-fe-ba-be
asset: file-format-signatures
title: "CA FE BA BE — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "<https://en.wikipedia.org/wiki/Java_class_file> Java class file , <https://en.wikipedia.org/wiki/Fat_binary#Apple> Mach-O Fat Binary"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "CA FE BA BE"
offset: "0"
extension: "class"
format: "<https://en.wikipedia.org/wiki/Java_class_file> Java class file , <https://en.wikipedia.org/wiki/Fat_binary#Apple> Mach-O Fat Binary"
unverified_fields: hex_signature, offset
---
**Hex signature:** CA FE BA BE

**Offset:** 0

**Extension:** class

**Format:** <https://en.wikipedia.org/wiki/Java_class_file> Java class file , <https://en.wikipedia.org/wiki/Fat_binary#Apple> Mach-O Fat Binary

> <https://en.wikipedia.org/wiki/Java_class_file> Java class file , <https://en.wikipedia.org/wiki/Fat_binary#Apple> Mach-O Fat Binary

Source: <https://en.wikipedia.org/wiki/List_of_file_signatures>