Extract data from Excel

Discuss
#1

In my offline quiz app almost 10000 Questions.I want store the excel in my app and extract data.How is it possible?Is there any alternative way for Such database(Offline)

I Know about an extension on Excel but its price is very high!

#2

Always search here before asking about an extension you need.
https://puravidaapps.com/extensions.php

#3

I searched but there listed extension is high price(35dollors)

#4

Convert it to JSON and save it as a string and use

#5