4 ms·

XLSX files are just zipped XML files: https://en.m.wikipedia.org/wiki/Office_Open_XML https://en.m.wikipedia.org/wiki/Office_Open_XML Hint: as far as I remembe

XLSX files are just zipped XML files: https://en.m.wikipedia.org/wiki/Office_Open_XML https://en.m.wikipedia.org/wiki/Office_Open_XML Hint: as far as I remember compression ratio is 0 (stored) - best to keep such on re-save for compatibility.

tluyben2 8y ago
Not really readable or editable though.
- pjmlp 8y ago
  They are with the help of tooling. https://docs.microsoft.com/en-us/office/open-xml/open-xml-sdk https://docs.microsoft.com/en-us/office/open-xml/open-xml-sd...