Mighty Merge is described as 'Does much more than just merge multiple CSV files together. It is now a full-fledged embeddable CSV Importer with rules, validations and all' and is an website. There are three alternatives to Mighty Merge, not only websites but also apps for Windows and SaaS. The best Mighty Merge alternative is csvbox.io, which is free. Other great sites and apps similar to Mighty Merge are CSV Merge and 4n6 CSV Merge Tool.
With csvbox.io you can add a production-ready import feature to your web app in just a few minutes. It is drop-in widget to allow your users to upload spreadsheets, map columns, and fix issues all with a few clicks. You receive clean and ready-to-use data in your app.
Quick CSV joiner tool to merge (and combine) CSV files with all data fields in 5 easy steps.
