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Thonny vs Python Tutor: catalog facts
Thonny	Python Tutor
Free Free and open source.	Free Free to use in the browser.
Windows, macOS, Linux	Web
Bundles Python, so there is nothing else to install Simple debugger suited to learning	Visualises stack frames, pointers and data structures step by step Supports Python, Java, C, C++ and JavaScript
Focused on Python only Fewer features than full professional IDEs	Suited to short teaching examples rather than large programs Requires an internet connection
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.