Relay: Browser-Based CSV Cleanup Tool

A self-initiated working concept that turns repetitive spreadsheet cleanup into a predictable browser tool.

THE PROBLEM Customer imports often contain extra spaces, inconsistent capitalization, duplicate email records, and fields that need normalization before they can enter a CRM or reporting workflow.

WHAT I BUILT • Configurable cleanup rules for whitespace, text case, and email normalization • Duplicate detection using normalized email addresses • Before-and-after data preview with input, output, and removed-row counts • Responsive table layout and clear processing states • Local browser processing—the demonstration data is not uploaded

PRODUCTION EXTENSIONS The same pattern can support custom column mapping, required-field validation, CSV or JSON export, and integration with a client API.

STACK React · TypeScript · JavaScript data transformation · Tailwind CSS

STATUS Self-initiated concept project. The sample records are fictional and no client results are implied.

Live interactive demo: https://launchcraft-studio.chiawei9223.chatgpt.site/#data-workflow