What is a .SIG file?
A .sig file is a detached digital signature verifying a file’s authenticity.
- Did you know
- A signature file lets you confirm a download came from who it claims and was not tampered with.
- A detached signature is verified with the signer’s public key, so any later change to the file makes the check fail.
- Such signatures are commonly produced with PGP or GnuPG, and ASCII-armoured ones use the related .asc extension.
- What Analyser reads
- Identify and read more security and forensics files: OpenPGP messages/keys/signatures (.pgp/.gpg/.sig - armor type, packet walk, key algorithm and user ID, secret-key warning), YARA rules, Snort/Suricata IDS rules, STIX/OpenIOC threat intel, Fiddler captures (.saz), 1Password exports (.1pux), Apple Keychain, KeePass 1.x (.kdb), Microsoft keys (.pvk) and AFF/AFF4 forensic images.
- Depth of analysis
- .SIG is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .SIG file
- Drag a .SIG file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.