Webinar Registrant CSV Upload

I’m sitting on a CSV file of webinar sign-ups that lists each registrant’s name, email, and phone number. Before I import it into my webinar platform I want the data fully validated and, if necessary, corrected... (Budget: ₹12500 - ₹37500 INR, Jobs: Data Analysis, Data Annotation, Data Cleansing, Data Entry, Data Management, Data Processing, Excel, PHP)