Dear ImGui vs NiceGUI
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A lightweight C++ library for building immediate-mode graphical user interfaces, mainly for tools and games.
Open source · MIT
A Python library for building web-based user interfaces without writing HTML or JavaScript.
The short answer
Choose Dear ImGui if you need…
- Game developers who want an in-engine debug or tools panel
- C++ developers building internal tools that need a quick interface
- Developers who want a small GUI library with few dependencies
Choose NiceGUI if you need…
- Python developers who want a quick web interface for a script or tool
- Hobbyists building dashboards or controls for hardware or smart home projects
- Engineers tuning machine learning or motor controller settings through a browser UI
- People who want to run a UI in a desktop window instead of a browser tab
Side-by-side
| Dear ImGui | NiceGUI | |
|---|---|---|
| Type | Library | Library |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 76.9k | 16.3k |
| Setup difficulty | Intermediate | Beginner |
| How you get it | Clone and build from source | Install with a package manager |
| Main language | C++ | Python |
| Last code update | 6 days ago | 5 days ago |
What each one is
Dear ImGui
Dear ImGui is a C++ library for drawing graphical user interfaces such as buttons, sliders, and windows. It is described as bloat-free with minimal dependencies, and it is commonly used for debug panels and tools inside games and other software. The README provided to me was empty, so this description relies mainly on the repository's description and topics.
NiceGUI
NiceGUI lets you write a web user interface in Python. You describe buttons, dialogs, charts, and other elements in Python code, and the framework shows them in a web browser. It is aimed at small web apps, dashboards, robotics projects, and smart home tools.
Best for
Dear ImGui
- Game developers who want an in-engine debug or tools panel
- C++ developers building internal tools that need a quick interface
- Developers who want a small GUI library with few dependencies
NiceGUI
- Python developers who want a quick web interface for a script or tool
- Hobbyists building dashboards or controls for hardware or smart home projects
- Engineers tuning machine learning or motor controller settings through a browser UI
- People who want to run a UI in a desktop window instead of a browser tab
Strengths
Dear ImGui
- Described as bloat-free with minimal dependencies
- Widely starred and actively pushed, with a v1.93.0 release listed
- Released under the permissive MIT license
NiceGUI
- Simple example: a few lines of Python produce a working page, as shown in the README
- Includes many ready-made elements such as charts, tables, Markdown, and file upload
- Reloads the page automatically when code changes, which speeds up iteration
Not ideal for
Dear ImGui
- People who want a ready-made desktop app with no coding, since this is a library for developers
- Teams that need a native-looking, polished end-user interface out of the box, because the README provided does not establish this
NiceGUI
- Large public websites that need heavy custom front-end work, since the README centers on Python-driven UIs rather than custom JavaScript pages
- Teams that need to write their UI in JavaScript or TypeScript, since all UI logic is written in Python
- Projects needing a verified production security or scaling track record, which the README does not address
Trade-offs
Dear ImGui
- The README was not available to verify features, APIs, or setup details
- Release v1.93.0 is listed without binaries, so you build from source
- Being a library, it requires C++ programming to use
NiceGUI
- The README says less about production deployment, security, and scaling than about getting started
- Built on Vue and Quasar behind the scenes, so deep customization may require knowledge of those tools
- Documentation and examples are hosted on an external site, so the README alone gives limited detail
Getting started
Dear ImGui
Clone the repository
git clone https://github.com/ocornut/imguiNiceGUI
Install NiceGUI from PyPI
python3 -m pip install niceguiFrequently asked questions
What is the difference between Dear ImGui and NiceGUI?
Dear ImGui: A lightweight C++ library for building immediate-mode graphical user interfaces, mainly for tools and games. NiceGUI: A Python library for building web-based user interfaces without writing HTML or JavaScript. Dear ImGui suits game developers who want an in-engine debug or tools panel, while NiceGUI suits python developers who want a quick web interface for a script or tool.
Are Dear ImGui and NiceGUI free?
Dear ImGui: Free and open source. NiceGUI: Free and open source.
Which is easier to set up, Dear ImGui or NiceGUI?
NiceGUI is easier to get started with (rated beginner); Dear ImGui is rated intermediate and usually needs more setup.
Is Dear ImGui or NiceGUI more popular?
Dear ImGui has more GitHub stars (76.9k) than NiceGUI (16.3k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Dear ImGui and NiceGUI?
Other options people compare them with include Dear PyGui, EnTT, Flame, Iced, PlayCanvas.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.