Add an InChI and an InChIKey column to a whole file. The structure column is found for you, every row converts in the browser, and the file comes back out in the format it went in.
Convert a structure to its InChI and InChIKey and back, convert a whole CSV, XLSX or SDF file, learn how the identifier is derived, and practise writing its layers. The InChI engine is WebAssembly running in your browser, so the tool needs JavaScript — and nothing you open ever leaves your machine.