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AI Tool

Unlock the Power of Language in Your Browser

Run Large Language Models Instantly with WebLLM

shipped Nov 20, 2025deploypaid
DeploySelf-hostedBrowser/WebAssembly
WebLLM - AI tool hero image

Why it matters

1Experience unmatched privacy and speed with fully in-browser LLM execution.
2Seamlessly integrate with OpenAI API features, including structured generation and function calling.
3Easily deploy state-of-the-art models and customize your own with minimal effort.

Stork’s verdict on WebLLM

WebLLM lets you run quantized LLMs directly in your browser, but you're still paying for browser-bound performance.

WebLLM reviewed by Stork AI · stork.ai/en/webllm

Specs

API Docs

View Documentation →

GitHub

View Repository →

API Available

Yes, public API

overview

What is WebLLM?

WebLLM is a cutting-edge MLC project designed to run quantized large language models directly in your browser. With WebGPU and WebAssembly, you can harness the power of LLMs without compromising on privacy or requiring server dependencies.

features

Key Features

WebLLM stands out with its versatile features that cater to developers' needs in building modern applications. From interactive web agents to chatbots, WebLLM provides essential tools and support.

  • OpenAI API compatibility with advanced features like streaming and logit-level control.
  • Support for a wide array of models, including Llama 3 and Phi 3, plus easy integration of custom models.
  • Built-in compatibility with Web Workers and Chrome Extensions for enhanced flexibility.

use cases

Real-World Applications

Whether you’re developing chatbots, local document Q&A tools, or innovative web agents, WebLLM helps you create privacy-focused applications that engage users effectively.

  • Create interactive chatbots that learn from user interactions.
  • Build Q&A systems over local documents for quick access to information.
  • Develop web agents capable of performing a variety of tasks in-browser.

insights

Future-Proof Your Development

WebLLM is continuously evolving to include broader multimodal capabilities. Upcoming features promise enhanced functionalities, including embedding models and vision-enabled LLMs for a richer user experience.

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GitHubgithub.com/mlc-ai/web-llm