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Split long text for ChatGPT and Claude

Paste a long document or code and break it into ordered, copy-ready parts that each stay under the character limit you set, so a single message never gets cut off.

Runs in your browser · nothing uploaded

Quick presets
0 characters · 0 parts
Paste a long document above to split it into copy-ready parts.

When you paste a large file into ChatGPT the text box quietly truncates it, and you lose the ending without knowing. This chatgpt character limit splitter cuts your document into numbered parts that each fit under a limit you choose, so nothing gets dropped on the way in.

It splits on paragraph and sentence boundaries first and falls back to spaces, so words and lines stay intact instead of breaking mid-token. Turn on the continuation preamble and each part tells the model to reply OK and wait, so the AI reads the whole thing in order before it answers.

How it works

  1. 1

    Paste your long text

    Drop in the full document or code you want to feed the model. Everything runs in your browser, so nothing is uploaded or stored anywhere.

  2. 2

    Set the character limit

    Type a max characters per chunk or tap a preset like 4000, 8000, 12000, or 15000. Pick a size that comfortably fits under your AI chat input limit.

  3. 3

    Copy each part in order

    The tool shows each numbered chunk with its character count and a Copy button. Paste part one, let the model reply OK, then paste the next, or use Copy all parts.

Questions about splitting text for AI

How do I paste large text into ChatGPT without it getting cut off?
Split the text into parts that each stay under the input limit and paste them one at a time. This tool does the splitting for you and can add a preamble that tells the model to wait until it has every part before answering.
How do I chunk a long document for AI across multiple messages?
Set a max characters per chunk, paste your document, and the tool breaks it into ordered parts on paragraph and sentence boundaries. Copy them in sequence into the same chat so the model reads the whole thing in order.
What character limit should I use per chunk?
A safe range is 4000 to 15000 characters. Larger chats accept more, but smaller chunks are easier to paste and re-send if one message fails, so many people start around 8000 to 12000.
Is it free?
Yes. It is free, needs no sign up, and works entirely in your browser. Your text is never uploaded, so you can split private documents and code safely.

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