Practical data tools that respect your privacy

HappyCSV is built by Chieyine Nelson, a medical doctor, full-stack software engineer, and AI/ML practitioner.

It is a collection of focused tools for merging, cleaning, converting, analyzing, and exporting tabular data.

Files are processed locally in your browser whenever a tool supports local processing. That means you can work with sensitive data without creating an upload account or sending the source file to a HappyCSV server.

We publish clear limits and explain what each tool does so you can choose the right workflow before downloading a result.