Convert CSV data to JSON format instantly. Supports custom delimiters, header detection, type inference, nested objects, file upload, and bidirectional conversion.
CSV (Comma-Separated Values) and JSON (JavaScript Object Notation) are two of the most widely used data formats, each with distinct advantages. CSV excels at tabular data — spreadsheets, database exports, and data analysis workflows. JSON excels at structured, nested data — APIs, configuration files, and web applications.
Converting CSV to JSON is essential when migrating data from spreadsheets or databases into web applications, building REST APIs that consume CSV data sources, importing flat-file data into NoSQL databases like MongoDB, and processing tabular data in JavaScript-based applications.
Key considerations during conversion include header handling (first row as keys vs. auto-generated), type inference (converting "123" to number 123, "true" to boolean true), delimiter detection (commas, semicolons, tabs, pipes), and handling quoted fields that contain the delimiter character.
For reverse conversion (JSON to CSV), nested objects must be flattened into columns, and arrays need special handling — either expanded into multiple rows or serialized as strings. Our tool handles both directions with full control over formatting options.