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Allowed file types

Restrict which file types users can upload to knowledge bases in your tenant. Uploads whose extension is not on the list are rejected.

Prerequisites

  • Organization Administrator role.

1. Open the knowledge source configuration

Go to Tenant Admin → Knowledge Sources → Allowed file types. The card is prefilled with the built-in default list, shown as chips (e.g. .pdf, .docx, .png).

2. Remove types you want to block

  • Click the x on any chip to stop accepting that file type.

3. Add another type

  • In the input, enter an extension (for example pdf, docx, png). The leading dot and letter case are ignored, and duplicates are not added.
  • Click Add. The extension appears as a new chip alongside the existing ones — adding does not clear the rest.

4. Save

  • Click Save in the footer that appears once you have unsaved changes.

Notes

  • Default list: the editor starts from Forra's built-in default list (common document, image, audio, text, PDF, CSV, Markdown, and ePub formats). If you remove every chip and save, the tenant falls back to that default list.
  • Enforcement happens on the server: a rejected upload returns an "unsupported file type" error even if a user bypasses the in-app file picker.
  • The list applies to every way a document enters a knowledge base: local uploads, documents picked from a cloud connector (SharePoint, OneDrive, Google Drive), and web links. Selecting a disallowed document from a connector is refused immediately with the same "unsupported file type" error, naming the offending extension.
  • Folders and items with no extension are not refused at selection time. Their contents are filtered later, during indexing: files whose type is not allowed are skipped.
  • Google Docs, Sheets, and Slides are evaluated on the format they are exported as (docx, xlsx, pptx). Allow those extensions if you want Google native documents to be indexed.