CSV (Comma-Separated Values) is a plain text format for storing tabular data. Each line represents a row, and fields are separated by commas. It's the most common format for data exchange between spreadsheets, databases, and applications. Use the JSON formatter to inspect source data, or YAML converter for YAML output.

CSV is ideal for flat tabular data and is widely supported by spreadsheet applications. JSON supports nested structures and is the standard format for APIs and web applications. This tool converts between them — nested JSON objects are flattened using dot-notation (e.g., user.name), and single objects are auto-wrapped into arrays.

Importing/exporting data between spreadsheets and web APIs, converting JSON API responses to CSV for analysis, preparing data for database bulk import with DB Viewer, sharing tabular data in a universally readable format.

Nested JSON objects are flattened using dot-notation — the original structure cannot be fully restored. Binary files and Excel (.xlsx) format are not supported.