Calculate open location codes for tabular data

[answerquest]

Input : A table having lat and long values.

Desired Output : Same table, with columns added carrying OpenLocationCodes at varying precision levels: 4,6,8,10.

Target Audience : Knows excel and copy paste. No coding.

Two possible ways to do it:

• Macro / script in spreadsheets. Errors encountered in making macros for LibreOffice
• Webpage based script where user can copy-paste their data in or load a file, and can copy out the output or download it as a csv or so.