Whopostedwhat

Who Posted What (whopostedwhat.com) is a Facebook-specific historical content search tool created by Henk van Ess that searches for Facebook posts by keyword within specific date ranges, surfacing historical public Facebook content that Facebook's own search does not provide.

For OSINT investigators, Who Posted What addresses a critical Facebook research limitation: Facebook's native search provides limited ability to search historical posts by date range. Who Posted What enables searches of Facebook public content within specific timeframes — essential for incident investigation when the relevant Facebook posts occurred on a specific date.

Historical incident documentation is the primary investigative application. When investigating events that occurred on a specific date, searching for posts mentioning the event, location, or associated terms during the relevant date range surfaces eyewitness accounts, contemporaneous documentation, and public discussion that was created when the event occurred.

Date-range search allows investigators to research what was being posted publicly on Facebook during specific investigation-relevant time periods — reconstructing the social media environment around specific events with temporal precision.

For disinformation and viral content investigations, Who Posted What can identify when specific narratives first appeared on Facebook and how they spread — tracing the origin and propagation timeline of specific claims.

Keyword and location combinations help narrow results to geographically relevant content — identifying public posts about specific locations or events within a defined date range.

Who Posted What's results link back to the original Facebook posts, allowing investigators to access the full post context, comment threads, and sharing history.

Document search terms, date ranges queried, and specific posts found with original Facebook URLs and timestamps.