Hello! Probat is a single HTML file, running on Python Pyodide and which is made to share works and proofs about mathematics. You can send it, cryptograpic SHA-256 attest, share URLs of your frozen files, correct files you receive and re-send.
Source: [Dev.to](https://dev.to/19algorythms/probat-pyodide-html-send-proofs-and-workspace-1g16)