Split Large Text and PDFs for Any AI Model

How to Use the Text Splitter

1. Upload or paste content: Drag in a PDF, Word Doc (max 20MB) or paste text directly. We extract the text securely.
2. Select platform: Choose a preset or enter a custom safe character limit.
3. Generate segments: Click the button. We intelligently divide text at sentence boundaries.
4. Copy & Paste: Use the copy buttons to feed each segment into your AI tool.
5. Bookmark for next time: Press Ctrl+D to save this tool for future use.

Guide: How to Split PDFs for ChatGPT (Step-by-Step,Updated)

Searching for “How to upload a large PDF to ChatGPT”? This guide explains the exact steps.

Why ChatGPT Needs Split PDFs

ChatGPT has a maximum input size. If you exceed it, ChatGPT will stop reading halfway or ignore parts. Free AI Text Splitter solves this by converting your PDF into perfectly sized, AI-ready segments.

1. Step 1 — Upload Your PDF: Upload your PDF (max ~20MB). The tool extracts all readable text locally on your device.
   (If your PDF is scanned, you’ll need OCR first.)
2. Step 2 — Select “ChatGPT” from the dropdown: The tool automatically applies a safe input limit.
3. Step 3 — Generate AI-Tailored Segments: Click "Generate AI-tailored text segments". The splitter breaks your PDF into clean parts with intelligent prompts.
4. Step 4 — Paste Segments into ChatGPT:
   • Paste segment 1.
   • Wait for ChatGPT to reply “ACKNOWLEDGED”.
   • Paste the next segment.
   • Continue until the final part.
5. Step 5 — Task Request: On the final part, ChatGPT will say: "ALL PARTS RECEIVED". That’s when you request your task (e.g., "Summarise the full PDF").
6. Step 6 — Bookmark: Bookmark this page (Ctrl+D) so you don't have to search for it again.

Guide: How to Split Text for Microsoft Copilot (Avoid the Character Limit)

Copilot has a much smaller character limit than other AIs. Users often see "Message too long". This guide solves that.

1. Step 1 — Paste or Upload: Paste your text or upload PDFs/Word files.
2. Step 2 — Select “Microsoft Copilot”: This ensures the output fits Copilot’s safe input size (~10k chars).
3. Step 3 — Click “Generate AI-tailored text segments”: The splitter creates chunks Copilot can accept without errors, injecting prompts to make it "wait" for the full context.
4. Step 4 — Feed Segments: Paste one by one, waiting for ACKNOWLEDGED.
5. Step 5 — Finish: At the end, Copilot will ask what you want to do with the complete document.
6. Step 6 — Download ZIP: For large documents (6+ segments), use the ZIP download.
7. Step 7 — Bookmark: Bookmark this page (Ctrl+D) for instant access next time.

Guide: How to Use the Custom Limit Option

The "Custom Limit" feature allows you to adapt the Free AI Text Splitter to virtually any Large Language Model—including new models, open-source LLMs, or private, self-hosted environments.

Step 1 — Go to the Tool and Select 'Custom Limit'

In the "Select Your AI Model" dropdown, choose: Custom Limit...

Step 2 — Ask Your LLM for its Safe Character Limit

Copy and paste this prompt into your LLM: "Give an estimated maximum number of characters you can reliably accept in a single message. Reply only with the number."

Step 3 — Input the Number and Prepare Your Text

Enter the numerical reply (e.g., 8000) into the "Character Limit" field.

Step 4 — Generate & Feed Segments

Click Generate. The tool will split your text precisely based on your custom limit. Feed the segments one by one just like with ChatGPT.