File and Document Analysis
- List the file types Grok supports for document analysis
- Upload a file and ask effective questions about its content
- Apply prompting techniques that improve the quality of document analysis results
Grok as a Document Reader
Most conversations with Grok involve typing a question. But some of the most useful work starts with a file. You can upload a PDF, image, spreadsheet, piece of code, or audio recording and have Grok read, analyse, and answer questions about it — treating the uploaded content as context for the conversation.
This means Grok becomes useful not only for knowledge it has built in, but for knowledge you bring to it. A contract you need to understand. A research paper you want to get through in five minutes. A dataset where you need a trend identified. A recording that needs to be transcribed and summarised.
How to Upload Files
On grok.com and in the mobile app, click the paperclip icon in the chat input area and select your file. You can also paste images directly by copying an image and pressing Ctrl+V on Windows or Cmd+V on Mac.
Supported file types (per xAI's official documentation) include:
- Documents — PDF, plain text, and common document formats
- Images — JPG, PNG, WEBP, and other standard formats
- Data files — CSV and spreadsheet formats
- Code — Source files in most programming languages
- Audio — MP3, WAV, and other common audio formats
After uploading, type your question in the same message or as a follow-up. Grok reads the file and responds based on its contents.
What You Can Do With Documents
Once a file is uploaded, you can ask anything about it:
- Summarise — "Give me a five-sentence summary of this document"
- Extract specific information — "What does this contract say about the termination clause?"
- Answer questions — "Based on this research paper, what were the three main findings?"
- Compare — Upload two documents and ask "What are the key differences between these two versions?"
- Analyse data — Upload a CSV and ask "Which category has the highest average revenue?"
- Transcribe audio — "Transcribe this recording and summarise the key points discussed"
- Review code — "Identify any bugs or improvements in this function"
Practical Use Cases by File Type
Tips for Better Results
- Be specific in your question — "Summarise this" gives a weaker result than "Summarise this in five bullet points for a non-technical manager"
- Reference the document explicitly — Phrases like "based on this document" or "according to the uploaded file" keep Grok anchored to what you provided rather than drawing from general knowledge
- Break large documents into focused questions — For a 50-page report, ask about specific sections rather than one broad question about the whole document
- Upload clean files — Scanned PDFs with poor OCR quality produce less accurate results than text-based PDFs where the text can be read directly
Try This
Find a PDF you have been meaning to read — a research paper, a long report, or a product manual. Upload it to Grok and ask: Summarise this document in five bullet points, then tell me the three most important things I should know. Follow up with one specific question about a section you want to understand more deeply. Notice how Grok stays anchored to the document content rather than adding general knowledge that might not apply to this specific file.
- Grok accepts PDFs, images, CSVs, code, and audio files — upload with the paperclip icon and ask questions in plain English
- Be specific in your question and reference the document explicitly to keep Grok anchored to the uploaded content
- Break large documents into focused questions per section rather than one broad question about everything