Open a file in Ballpoint
Add a file. You get a link that opens it in the right Ballpoint editor: a PDF beside a writing box, a Word file in the document editor, a notebook or Python file in the notebook, any other code file in the code editor.
Your files
Files stay in this browser: they are not uploaded, so a link opens only in this browser for now. Signing sends Ballpoint a fingerprint of what you wrote, never the file.