Only text documents are supported. The following table shows the file types and their file size limits:
| File type | File size limit |
|---|---|
| Google documents | 10 MB when exported from Google Workspace |
| Google drawings | 10 MB when exported from Google Workspace |
| Google slides | 10 MB when exported from Google Workspace |
| HTML file | 10 MB |
| JSON file | 1 MB |
| Markdown file | 10 MB |
| Microsoft PowerPoint slides (PPTX file) | 10 MB |
| Microsoft Word documents (DOCX file) | 50 MB |
| PDF file | 50 MB |
| Text file | 10 MB |
Using Vertex AI RAG Engine with other document types is possible but can generate lower-quality responses.