Run your tkinter project
directly in the browser
Upload any Python tkinter app — no rewrites, no servers, no installation. It runs exactly as-is, powered by Pyodide and Pyroom's custom tkinter engine.
Free to use. No account required.
Three steps to run your project
LaunchPad handles the rest — you just upload and run.
Upload your project
Drop a .py file, a .zip archive, or paste a public GitHub repository URL. LaunchPad loads all files automatically.
Select entry point
LaunchPad detects the most likely main file automatically. Review the file tree and pick a different entry point if needed.
Run in the browser
Click Run. Pyodide loads Python 3.11 in a Web Worker and your tkinter interface renders live in the Preview panel.
Everything you need to run tkinter
LaunchPad is built on the same Python runtime that powers the Pyroom playground.
Drag-and-drop upload
Drop a .py or .zip file directly onto the page. Single files and multi-file projects are both supported.
Auto entry-point detection
LaunchPad scans your project and automatically picks the most likely main file — you can override it from the file tree.
Live tkinter preview
Windows, buttons, labels, entries, canvases — tkinter widgets render in real time inside the browser Preview panel.
Interactive console
See print() output in real time. input() prompts pause execution and wait for your reply — just like a real terminal.
Compatibility checker
Before running, LaunchPad flags any APIs or patterns that are unsupported in the browser environment — no surprises.
Load from GitHub
Paste any public GitHub repository URL — LaunchPad fetches the code directly and has it ready to run in seconds. No cloning, no downloading.
What's supported
LaunchPad uses Pyroom's tkinter compatibility engine — a browser-native implementation of the tkinter API.
Supported tkinter APIs
Tk(),mainloop(),title(),geometry()Button,Label,Entry,Frame,TextCanvas,Listbox,Scrollbar,ScaleCheckbutton,Radiobutton,OptionMenuMenu,add_command(),add_cascade()messagebox— showinfo, askokcancel, askyesnofiledialog— askopenfilename, asksaveasfilename.pack(),.grid(),.place()geometry managersStringVar,IntVar,BooleanVarafter(ms, callback),after_cancel()
Known limitations
threading/multiprocessing— not supported in WASM- Real filesystem access — sandboxed in browser
- Raw network sockets — unavailable in browser
Toplevelsecondary windows — not implemented- Canvas
imageandbitmapitems — partial support - Custom font families — limited to web-safe fonts
messageboxuses browser dialogs (alert / confirm)filedialoguses browser prompt — no real file picker
Who is LaunchPad for?
LaunchPad bridges the gap between local Python development and the browser.
Students running assignments
Built a tkinter project for class? Upload it to LaunchPad and run it instantly in the browser — no Python installation needed.
Teachers reviewing student work
Open student-submitted .py or .zip projects directly in the browser during class — no local Python environment required.
Developers testing GUI projects
Quickly verify that your tkinter app runs correctly in the browser and spot compatibility issues before shipping.
Learning Python with a GUI
Experiment with tkinter widgets without any local setup. Great for workshops, tutorials, and anyone getting started with Python GUIs.
Need a custom deployment?
Want LaunchPad pre-loaded with your project for a workshop, course, or team? Use the Request custom deploy button inside the app to send us your requirements — we'll get back to you.
Open LaunchPad to request →Ready to launch your project?
Upload your tkinter app and see it run in the browser in seconds.