About the Hub

The File & Format Hub is a static reference for identifying common file extensions, understanding their formats, comparing file types, and finding compatible software. Every entry combines editorial copy with reviewed technical facts.

How records are reviewed

Each extension record includes a reviewed date, a source list, and a safety classification. Records are excluded from the published dataset until they have a complete description, compatible software, at least one evidence source, and a valid reviewed date.

What this site does not promise

An extension alone never proves that a file is safe. We provide neutral guidance and encourage users to verify the source, use updated software, and avoid opening executable content from untrusted senders.