---
type: lookup
id: ico-00-00-01-00
asset: file-format-signatures
title: "00 00 01 00 — File format magic numbers"
sources:
  - https://en.wikipedia.org/wiki/List_of_file_signatures
source_quote: "Computer icon encoded in <https://en.wikipedia.org/wiki/ICO_(file_format)> ICO file format [ 8 ]"
generated: true
verified: false
harvested: 2026-08-03
stale_after: 2027-08-03
hex_signature: "00 00 01 00"
offset: "0"
extension: "ico"
format: "Computer icon encoded in ICO file format"
unverified_fields: format, hex_signature, offset
---
**Hex signature:** 00 00 01 00

**Offset:** 0

**Extension:** ico

**Format:** Computer icon encoded in ICO file format

> Computer icon encoded in <https://en.wikipedia.org/wiki/ICO_(file_format)> ICO file format [ 8 ]

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