CSV to JSON Converter

Easily turn CSV or tab-delimited (Excel/TSV) data into JSON arrays for testing APIs, seeding databases, or transforming datasets. Our tool does it directly in your browser with zero uploads.

Copy from Excel, Paste as JSON

Skip the file uploading process. Simply copy a table from Microsoft Excel, Google Sheets, or Numbers, and paste it directly into our converter. It automatically parses TSV (Tab-Separated Values) and generates clean JSON objects using your column headers as keys.

Smart Type Inference

Our parser is smart enough to detect numbers, booleans, and null values automatically. Instead of treating every cell as a string, it outputs valid JSON types, saving you from writing custom type-casting logic later.

Common Workflows

Data Seeding: Convert spreadsheet mock data into JSON for database seeding or unit testing.
API Mocking: Quickly build JSON payloads for mock servers based on client-provided Excel requirements.
Data Transformation: Convert legacy CSV exports into modern JSON formats for integration with REST APIs or NoSQL databases like MongoDB.

Your Data Stays on Your Machine

If you are working with sensitive company data, customer lists, or proprietary financial records, uploading CSV files to random online converters is a huge security risk. Our CSV to JSON converter runs the conversion locally in your browser memory. We never see your data.