Review the supported formats, capacity limits, and operational boundaries for Knowledge Base in Acrobat.
Knowledge Base in Acrobat applies limits to collections, source files, chats, connectors, website indexing, and other features. Use this page to understand the supported content types and maximum values before you build collections, configure integrations, or start AI Assistant workflows. Limits can vary by feature or deployment, so review the applicable section when planning large or complex use cases
Document ingestion limits
The following limits apply when adding documents to Knowledge Base.
| Content type | Limit |
|---|---|
| Up to 1,500 pages and 500 MB per file | |
| Microsoft Office and other supported document formats | Up to 1,500 converted pages and 100 MB per file |
Documents can include images and figures, such as graphs and tables. Knowledge Base extracts supported image content and alt text from PDF and Word documents for processing.
Supported file types
Knowledge Base in Acrobat supports a wide range of file formats in addition to Adobe PDF files, including Microsoft Office formats such as Excel, Word, and PowerPoint. The following file extensions are supported:
Adobe Acrobat |
|
.ppt |
Microsoft Powerpoint |
.pptx |
Microsoft Powerpoint |
.odp |
Openoffice |
.odt |
Openoffice |
.xls |
Microsoft Excel |
.xlsm |
Microsoft Excel |
.xlsx |
Microsoft Excel |
.doc |
Microsoft Word |
.docx |
Microsoft Word |
.dot |
Microsoft Word |
.dotx |
Microsoft Word |
.rtf |
Microsoft Word |
.txt |
Notepad |
.csv |
Microsoft Excel |
.eml |
Microsoft Outlook |
.html |
HTML Browser page |
Files type except .csv, .xls, .xlsm, .xlsx, .txt, eml and .html types are converted to Adobe Acrobat PDF documents and saved as such.
AI Assistant attachment limits
When attaching content directly to an AI Assistant conversation, the following limits apply:
| Attachment | Limit |
| Individual file | Up to 8 MB |
| Individual image | Up to 10 MB |
| Combined images | Less than 25 MB |
| Combined files | Less than 16 MB |
Files and images attached to a conversation are added to the collection and can be queried using Direct Mode or Collection Mode.
Connector synchronization
SharePoint and Google Drive connectors synchronize modifications and deletions made in the connected source.
Changes do not synchronize in both directions. Deleting content from a Knowledge Base collection does not delete the corresponding content from SharePoint or Google Drive.
Metadata tag availability
Metadata tags used to classify and filter documents are available only through the Knowledge Base APIs. They are not available through the standard Knowledge Base user interface.
