---
type: lookup
id: chm-49-54-53-46-03-00-00-00-60-00-00-00
asset: file-format-signatures
title: "49 54 53 46 03 00 00 00 60 00 00 00 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "MS Windows HtmlHelp Data"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "49 54 53 46 03 00 00 00 60 00 00 00"
offset: "0"
extension: "chm"
format: "MS Windows HtmlHelp Data"
unverified_fields: extension, hex_signature, offset
---
**Hex signature:** 49 54 53 46 03 00 00 00 60 00 00 00

**Offset:** 0

**Extension:** chm

**Format:** MS Windows HtmlHelp Data

> MS Windows HtmlHelp Data

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