AI Chatbot makes it easier to work with long, text-heavy PDFs in KDAN PDF (formerly KDAN PDF Reader) for Mac. It helps you spot key points, gain insights, and edit with confidence so you can focus on what matters most.

If you want to get better responses faster, take a look at our Prompt Pack.

Note: This interface is available in v3.24.1 and later. Update to enjoy the latest experience.

Who can use it

• Free access for everyone
  Both Free users and Document 365 subscribers can use AI Chatbot with a limited monthly allowance at no extra cost.
   
• More with AI plans
  Need more chatting allowance? Subscribe to Document 365 AI+ or Document 365 AI+ & eSign in KDAN PDF Reader for Mac to unlock full AI features.
• Platform & sign-in
  AI Chatbot is available on KDAN PDF Reader for Mac (v3.24.1 or later). Sign in with your KDAN ID to get started.
   

Step01：Open AI Chatbot

1. Open a PDF in KDAN PDF for Mac.
2. Click AI Tools and choose AI Chatbot, or click the AI Chatbot icon in the right toolbar to open the chat box . 
3. Heads-up: Make sure to save (or discard) your text edits or redactions before switching over to the AI Chatbot.

Step02: Ask AI Chatbot to Review Key Details

Open the chat box, type your question, or pick a suggested prompt to begin.

Step03: Copy Results and Add a Note

After getting the response in AI Chatbot, you can save the key points directly in your PDF as a note.

1. In the AI Chatbot panel, click Copy to copy the response.

   

2. Switch to Annotation from the top toolbar.

3. Select Note, then click anywhere on the page to paste the copied content.

4. Click Save to keep the note with your document.

   

This lets you keep explanations and insights right next to the original content for later review.

What you can ask AI Chatbot to do

• Summarize the document or a section
• Explain terms, clauses, or dense passages
• Surface potential risks or opportunities in contracts, proposals, reports
• Suggest edits for clarity or structure

These capabilities help you manage long documents with ease, turning dense text into clear takeaways so you can decide or edit faster.

Usage & limits

When AI Chatbot isn’t available

Here are the common situations and what you can do when you can’t access the AI Chatbot in the app:

• File is too large (over 25 MB)
  Try compressing the PDF or splitting it into smaller files, then open AI Chatbot again.
• Document is encrypted or restricted
  Remove the password or check file permissions before using AI Chatbot.
• No internet connection
  Reconnect and click Retry when prompted.

Note:  The AI Chatbot takes a break while you edit, redact, or change pages. Finish up to see it again.

Language

AI Chatbot uses the app language. Languages supported  include English, Chinese, Japanese, Korean, Spanish, Portuguese, German, French, Italian, and Russian.

Tips for better results

• Ask one specific question at a time.
• If the PDF is huge, consider splitting it into smaller files to stay within limits.
• Use Clear chat before switching to a different task, so the AI focuses on the new instructions.
• Copy AI Chatbot results anytime to reuse content in your documents or notes.

How We Protect Your Privacy and Data

We use advanced encryption standards, AES-256, to encrypt your input information. Your input will be deleted after 24 hours. However, it is recommended to avoid entering personal or sensitive information and to review AI-generated content before use.
Please click this link to learn more about our privacy policy.

While your data is secured on our side, it’s also important to use AI Chatbot wisely.

Avoid sharing personal or sensitive data. AI Chatbot is here to assist your reading and editing, but always review the output before you rely on it.

Updated January 19, 2026 09:23