jExcel is a jQuery plugin to embed a spreadsheet, compatible with Excel, in your browser.
You can load data straight to the table from a JS array, json or even a CSV file. You can copy and paste from or to Excel straight to jExcel.
Echo is able to read tables from a website or a html file and convert it to JSON or CSV. Perfect for saving data from a website and loading it into excel, database, etc.
Papa Parse is a robust and powerful CSV (character-separated values) parser with these features: