LanguageGUI

What is LanguageGUI?

LanguageGUI is an open-source UI kit that extends what large language models (LLMs) can do by adding graphical user interfaces to their text outputs. It makes AI conversations more visual and interactive, and includes over 100 UI components, widgets, and ready-made screens for chat bubbles, sidebars, multi-prompt workflows, and other conversational interfaces. Released under the MIT License, it is free to use for both personal and commercial projects, giving developers a solid starting point for building AI applications.

Who created LanguageGUI?

LanguageGUI was built by Tonki Labs, with Mauro Sicard and Miguel Joya leading development and other team members contributing.

What is LanguageGUI used for?

LanguageGUI’s core function is transforming plain text output from LLMs into interactive graphical elements. Common uses include:

• Building chat interfaces — familiar chat windows that feel natural to use.
• Setting up multi-prompt workflows — managing interactions where users input information in stages.
• Customizing chat sidebars — adding navigation or information panels alongside chat.
• Jumpstarting design — using pre-built screens and templates to save time.
• Enhancing LLM output — giving AI models a visual dimension.

Key features

• 100+ UI components with customizable screens
• 10+ conversational UI widgets for chat-like interactions
• 30+ pre-built screens ready to use out of the box
• Dark mode for comfort and screen adaptability
• Figma Auto Layout so interfaces stay flexible and responsive across screen sizes
• Variables and styles for consistent, easier customization
• MIT License — adaptable for personal and commercial projects

Why it matters

For developers working on conversational AI, LanguageGUI bridges the gap between raw text output and a polished user experience. Instead of building interfaces from scratch, you get a library of components and screens designed specifically for LLM-driven applications, and the open-source license means you can adapt it freely to whatever you’re building.