Split long prompts into numbered chunks so ChatGPT and other AI chatbots can process them safely.
Paste a long prompt above and it will be split into numbered chunks you can send to ChatGPT one by one.
Stick to 15,000 Characters
ChatGPT handles up to ~15,000 characters reliably per message. Going higher risks truncation or lost context.
Send Parts in Order
Always send the Instructions message first, then each numbered part sequentially. Wait for confirmation before sending the next.
Works with Any AI
While designed for ChatGPT, this splitting pattern works with Claude, Gemini, Copilot and other AI chatbots with message length limits.
ChatGPT and other large language models have a maximum input length per message. If your prompt, document or code exceeds that limit, the text gets silently truncated and the AI loses critical context. Splitting ensures every character is received intact.
The generally accepted safe limit is around 15,000 characters per message for ChatGPT (GPT-4). This accounts for both the visible text and internal token overhead. Staying below this threshold prevents unexpected cut-offs.
The Instructions message primes the AI to expect a multi-part message. It explains the numbering format and tells the model to wait until all parts arrive before answering. This prevents the AI from generating a premature response after receiving only part of your data.
Yes β click the "Custom" option and enter any character limit. Smaller chunks are useful for AI models with tighter limits, while larger chunks reduce the number of messages you need to send.
Absolutely. The splitting pattern is model-agnostic. Any AI chatbot that can follow sequential instructions will understand the numbered-part format and reassemble the full prompt.
No. Everything runs locally in your browser. Your prompt text is never uploaded, logged or stored on any server. The tool works fully offline once loaded.
Prompt Splitter is a free online tool that breaks long prompts, documents, code files and articles into numbered, AI-ready chunks. It automatically generates an instruction message and wraps each chunk with start/end markers so ChatGPT, Claude, Gemini and other AI chatbots can reassemble the full content before responding.
The default 15,000-character limit is optimized for ChatGPT (GPT-4), but you can set any custom size. All processing happens client-side in your browser β your data never leaves your device, there are no rate limits, and no account is required.
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