What is this?

This is a language agnostic way to identify file types by their magic numbers.

This supports every signature in https://en.wikipedia.org/wiki/List_of_file_signatures, with some changes & additions.

For usage, see the examples directory.

Different files

• file_sigs.csv is the source of truth for file signatures.
• dist/rows_map.json is a map of all the file signatures, except those in offset_list.json, it's primarily used for generating lookup_map.json.
• dist/offset_list.json is a list of all the file signatures that need to be checked at a specific offset.
• dist/lookup_map.json is a lookup map of all the file signatures, except those in offset_list.json. It's used to quickly lookup a signature of unknown length.

Extensions

Additions

Add new extensions by modifying file_sigs.csv, put it in this list, then run python3 convert.py. Afterwards, submit a PR. All contributions are loved and welcome.

• svg

Supported extensions (shortened, see CSV for full list)

• pcap
• pcapng
• rpm
• sqlitedb
• bin
• wad
• PDB
• DBA
• TDA
• TDF$
• TDEF
• ico
• icns
• 3gp
• z
• lzh
• bac
• idx
• plist
• bz2
• gif
• tif
• cr2
• cin
• nui
• dpx
• exr
• bpg
• jpg
• jp2
• ilbm
• 8svx
• acbm
• anbm
• anim
• faxx
• ftxt
• smus
• cmus
• yuvn
• iff
• aiff
• lz
• cpio
• exe
• zip
• rar
• png
• com
• class
• txt
• ps
• eps
• chm
• hlp
• pdf
• asf
• ogg
• psd
• wav
• avi
• mp3
• bmp
• iso
• cdi
• mgw
• nes
• d64
• g64
• d81
• t64
• crt
• fits
• flac
• mid
• doc
• dex
• vmdk
• crx
• fh8
• cwk
• toast
• dmg
• xar
• dat
• tar
• oar
• tox
• MLV
• 7z
• gz
• xz
• lz4
• cab
• ??_
• flif
• mkv
• stg
• djvu
• der
• csr
• key
• ppk
• pub
• dcm
• woff
• woff2
• xml
• wasm
• lep
• swf
• deb
• webp
• rtf
• ts
• m2p
• mpg
• mp4
• zlib
• lzfse
• orc
• avro
• rc
• p25
• pcv
• pbt
• ez2
• ez3
• luac
• alias
• Identifier
• eml
• tde
• kdb
• pgp
• zst
• rs
• sml
• srt
• vpk
• ace
• arj
• zoo
• pbm
• pgm
• ppm
• wmf
• xcf
• xpm
• aff
• Ex01
• e01
• qcow
• ani
• cda
• qcp
• dcr
• dir
• flv
• vdi
• vhd
• vhdx
• isz
• daa
• evt
• evtx
• sdb
• grp
• icm
• pst
• drc
• grib
• blend
• jxl
• ttf
• otf
• wim
• slob
• voc
• au
• hazelrules
• flp
• flm
• mny
• accdb
• mdb
• drw
• dss
• adx
• indd
• skf
• dtd
• wallet
• nri
• wks
• sib
• dsp
• amr
• sil
• hdr
• vbe
• cdb