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SUPPORTED FORMATS: .XLSX / .XLS / .CSV / .MD
No. MakoDoc processes everything locally in your browser using WebAssembly. Your files never leave your device; there is no server and no network upload.
Yes. MakoDoc is completely free, with no sign-up and no account required.
Yes. Open a .xlsx, .xls or .csv file in MakoDoc and it is parsed entirely on your device. Nothing is sent to a server.
Yes. After the app has been loaded, the core editor is available from the browser cache. Optional lazy-loaded features such as Mermaid diagrams and PNG/PDF export become offline-ready after they have been loaded once.