Convert JSON objects and arrays to CSV or transform CSV data into formatted JSON with support for quoted fields and special characters.
Your support helps us build more tools and improve the ones you already use.
More tools you may find useful.
Convert JSON to YAML or YAML to JSON with validation and formatted output directly in your browser.
Convert colors between HEX, RGB, and HSL formats with live color preview.
Format, validate, and inspect JSON data with syntax highlighting, detailed validation errors, and an easy-to-read structured output.
Write Markdown and preview formatted output instantly. Copy or download your Markdown document.
Convert JSON to CSV or CSV to JSON with ToolTunnel's free online converter. Transform JSON objects and arrays into spreadsheet-friendly CSV data, or convert CSV rows into formatted JSON. Supports headers, quoted fields, commas, escaped quotes, and multiline values directly in your browser.
A JSON to CSV converter transforms structured JSON data into comma-separated values that can be opened in spreadsheet applications and imported into data analysis workflows. The reverse conversion turns tabular CSV data into JSON objects that are convenient for APIs, applications, and scripts.
This online JSON CSV converter supports both conversion directions. It runs locally in your browser without sending your input to an external conversion API.
JSON to CSV conversion is useful when you need to export records for spreadsheets, reporting, data analysis, or importing into another application. The converter accepts a single JSON object or an array of JSON objects.
Object properties become CSV columns. When objects contain different properties, the converter creates a combined set of columns and leaves cells empty when a property is missing. Nested objects and arrays are represented as JSON text within a cell.
CSV to JSON conversion transforms rows into JSON objects. By default, the first CSV row supplies the property names for the generated objects. You can disable the header option to treat every row as data and generate names such as column_1 and column_2.
The converter preserves CSV cell values as strings. It does not automatically infer numbers, booleans, dates, or null values, so you can review or transform data types separately when your application requires them.
Invalid JSON syntax, including missing commas, unmatched braces, and improperly escaped strings, prevents JSON conversion. Validate the source JSON before converting it.
CSV fields containing commas, quotation marks, or line breaks must follow CSV quoting rules. Inconsistent column counts can indicate malformed or incorrectly exported source data.
Yes. ToolTunnel provides this converter free of charge, and the conversion runs directly in your browser.
Select JSON → CSV, paste a JSON object or an array of objects, and click the conversion button. Review the generated CSV, then copy or download it.
Select CSV → JSON, paste your CSV data, choose whether the first row contains headers, and click the conversion button. The tool generates a JSON array of objects.
Yes. The converter accepts arrays of JSON objects and builds CSV columns from their properties. Missing properties produce empty cells.
Yes. It supports quoted fields, commas inside quoted fields, escaped quotation marks, and line breaks inside quoted fields.
CSV is a text-based tabular format, so JSON values are converted to text. Nested objects and arrays are represented as JSON text inside cells, and the reverse conversion returns CSV cell values as strings.
Yes. Disable the first-row-contains-headers option. The converter will treat the first row as data and generate column names such as column_1 and column_2.
No. The conversion itself runs locally in your browser and does not require an external conversion API.