You can search file and folder names, as well as the content of certain files, in the Keeper Web App. Currently Keeper can search the contents of the following file types:
- Microsoft Office Doc: .doc, .docx
- Microsoft Office PowerPoint: .ppt, .pptx
- Microsoft Office Excel: .xls, .xlsx
- LibreOffice files
- OnlyOffice files
- PDF files
- Markdown files: .md
- Various source code files
- Text files: .txt, .log
Please note, encrypted libraries and their subfolders/files are not searchable.
Source: Seafile Help