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Langdock supports the following file types: Text-based files: For text-based files, there’s an additional 8 million character limit that applies alongside the file size limit. So a PDF, for example, can be up to 256 MB in file size or hit the 8 million character limit. Knowledge bases accept supported text based formats such as PDF, DOCX, TXT, Markdown, and presentations. Tabular Files: Tabular files can be uploaded directly in chat, Agents, and Library Folders for active file work, and they sync from SharePoint or Google Drive folders via Folder Sync. They cannot be uploaded to Knowledge bases. Spreadsheets in Recent Files support preview with sheet tabs, zoom, column resizing, and formula inspection. For technical details, see tabular files in Knowledge bases. Images: Images can be uploaded in chat conversations, Agent chats, and Library Folders. They cannot be uploaded to Knowledge bases or agent knowledge. Audio Files Audio files can be uploaded in chat conversations and Agent chats. They cannot be uploaded to Knowledge bases, Library Folders, or agent knowledge.

FAQ

A file type can be generally supported but still fail because of file size, corruption, password protection, scan quality, unusual encoding, or content that cannot be extracted reliably. Try a smaller or cleaner version of the file and check whether the file works as a direct upload or should be converted first.
No. Spreadsheets and tabular files often need different handling from text documents. If exact rows, formulas, or calculations matter, use the file directly in a chat or workflow designed for data analysis instead of assuming it will behave like a text document in retrieval.