Install GPTLocalhost Add-in as a local Word Add-in if you use Windows.

  • This manual step is required for any local Word Add-ins, according to Microsoft.
  • On Windows, “net share” is required for Microsoft Word to access the local Word Add-in.
  • In Microsoft Word, please install GPTLocalhost Add-in under “Developer Add-ins” to make it run locally.

  • After installation, you can now connect your favorite LLM server in Microsoft Word directly and locally.

  • Private AI for Word: Using Qwen3 and Phi-4 for Constrained Writing

    What is Constrained Writing? In professional drafting, Constrained Writing is the art of generating text that must adhere to strict rules, patterns, or limitations. Unlike free-form creative writing, read more

  • Private AI for Word: Using GLM-4-32B-0414 or Gemma-3-27B-IT-QAT?

    Looking for a way to leverage private and powerful GPT models within Microsoft Word? Consider the recently released GLM-4-32B-0414 series models. Its performance is comparable to OpenAI’s GPT read more

  • Private AI for Word: Using Powerful Gemma-3 QAT Models for Text Rewriting

    Introduction In the landscape of Private AI for Word, the ability to transform and polish professional prose without sacrificing data security is a high-priority requirement. For legal, medical, read more

  • Private AI for Word: Using Reka Flash 3 for Creative Writing and Reasoning

    What is Reasoning-Based Creative Writing? In professional drafting, Creative Writing often requires more than just “generating text”—it requires the model to follow a logical thread, maintain a consistent read more

  • Private AI for Word: Using Skywork-OR1 for Math Reasoning

    If you’re seeking private GPT models for Microsoft Word, consider the latest Skywork-OR1 (Open Reasoner 1) models. This series consists of powerful math and code reasoning models trained read more

  • Private AI for Word: A Taste of General Intelligence with Cogito-32B

    Private AI for Word represents the next frontier in data ownership, allowing users to experience a taste of general intelligence directly within their document creation. According to Deep read more

  • Private AI for Word: Using Gemma 3 (27B) for Summarization

    If you’re exploring alternatives to Microsoft Copilot, consider Google’s newly released Gemma 3, a new family of state-of-the-art, lightweight open models designed to run efficiently on single GPUs read more

  • Private AI for Word: Creative Writing and Complex Reasoning with QwQ-32B

    The Breakthrough: A Compact Reasoning Model with Cutting-Edge Performance Private AI for Word deployment is now more powerful than ever thanks to the arrival of QwQ-32B, a model read more

  • Private AI for Word: Using QwQ-32B to compare 9.9 and 9.11

    If you’re seeking an alternative to Microsoft Copilot, consider Qwen’s newly released QwQ-32B. This open-source LLM excels in complex reasoning and holds its own against larger models like read more

  • Msty: A Powerful Local LLM Host for Private Word Drafting

    If you are looking for a robust alternative to Microsoft Copilot that offers total control over your model selection, Msty (formerly Msty Studio) is a premier choice for read more

For more demos, please check our YouTube channel.

Installing GPTLocalhost

Use IBM Granite 4 for Contract Analysis

Seamless Model Switching

Register Your Device to Be Completely Offline

Apple Intelligence in Microsoft Word

Automatic Markdown Format Conversion

Empower Your Team on Your Intranet

Intranet solution: LocPilot

Using AnythingLLM in Microsoft Word

Using LM Studio in Microsoft Word

Using Transformer Lab in Microsoft Word

Using Msty for Multiple LLMs in Microsoft Word

Using Ollama in Microsoft Word

Using llama.cpp in Microsoft Word

Using LocalAI in Microsoft Word

Using KoboldCpp in Microsoft Word

Using Xinference in Microsoft Word

Using OpenLLM in Microsoft Word

Using LiteLLM in Microsoft Word

Using Microsoft Foundry Local for GPU and CPU



Technical Control: How GPTLocalhost Secures Your Data

Most AI tools for Word are “Cloud Add-ins,” which act as windows to a remote server. GPTLocalhost is built differently. We utilize a specific architecture designed for local development and private sideloading, ensuring your data remains entirely under your total control.

The Microsoft “Local-Only” Advantage

According to the official Microsoft Office Add-in specification, the platform allows for “Localhost” manifests. This unique technical feature was originally designed by Microsoft to let developers build and test Add-ins locally without ever deploying them to a public cloud or external server.

GPTLocalhost leverages this specific loophole to provide 100% data ownership. By running as a local Add-in that communicates exclusively with your own machine, we guarantee:

  • No External Endpoints: Your text is never sent to a third-party API or cloud processing center.

  • The “Development” Security Standard: We treat your daily workspace with the same isolation that engineers use for top-secret prototypes.

  • Complete Private Ownership: Because the Add-in exists and runs entirely on your local server, you maintain absolute authority over your intellectual property.

Why This Matters for Professionals

For legal, medical, and financial professionals, a “Privacy Policy” is just a promise—but a local manifest is architectural proof. By utilizing Microsoft’s own local-only specs, GPTLocalhost provides total control over your data, bypassing the cloud vulnerabilities that affect tools like Microsoft Copilot and ChatGPT.