Contact

What to send

• Corrections of factual errors or outdated information.
• Requests for extensions or MIME types to add.
• Suggestions for new formats in the File Signature Checker.
• Advertising or privacy questions.
• Display bugs or broken links.

What we can't accept

• Promotional listings or vendor placement requests.
• One-off file analysis or recovery work.
• Individual malware sample triage (use a dedicated analysis service).

Reply expectations

• We aim to reply within three business days.
• Complex technical corrections may get an acknowledgement first, then a follow-up once we've verified.
• We can't guarantee a reply to every message.

Security reports

For security issues or incidents that could leak user data, prefix your subject line with security. These take priority.