JSON to CSV Converter — Free Online JSON to CSV Tool

JSON to CSV Converter — Free Online JSON to CSV Tool. Free online JSON to CSV converter. Paste any JSON array to instantly convert it to CSV format with automatic header detection — all processed in your browser with no data uploaded.

Instantly convert JSON to CSV with our free online JSON to CSV converter. Paste any JSON array and get a comma-separated CSV output with automatic header detection — perfect for opening in Excel, Google Sheets, or any spreadsheet application.

Whether you are a data analyst exporting API responses, a developer converting database records, or a marketer preparing user data for reports, our tool makes it easy to convert JSON to CSV online in seconds.

Our JSON to CSV tool supports JSON5 syntax, handles missing fields gracefully, and runs entirely in your browser — your data never leaves your device.

Try our CSV to JSON Converter to reverse the process, JSON Prettify to format your JSON first, or JSON to YAML for other format conversions.

Frequently asked questions

How do I convert JSON to CSV?

Paste a JSON array of objects, such as a list of records from an API, into Your JSON array, or click Load sample. The CSV output shows a header row followed by one line per object; copy it into Excel, Google Sheets or a .csv file. A single object becomes one row.

How are the CSV column headers created?

Headers are collected from every object in the array, in the order the keys first appear. If an object lacks one of the keys, that cell is left empty, so records with different fields still line up.

How are nested objects and arrays handled?

Nested objects are flattened into dot-notation columns, so an address object with a city key becomes an address.city column. Arrays are kept in one cell as compact JSON text, for example ["a","b"], and an empty object is written as a pair of empty braces. Plain values or arrays that contain non-objects are rejected with an error message.

How are commas, quotes and line breaks handled?

The output follows RFC 4180: a value that contains a comma, a double quote or a line break is wrapped in double quotes, and double quotes inside it are doubled. Line breaks are kept inside the quoted cell. null is written as the word null.

Is my JSON uploaded to a server?

No. The conversion runs in your browser. Your data only leaves the page if you click Copy link, which puts the input into a shareable URL.

How to use this online tool

JSON to CSV Converter — Free Online JSON to CSV Tool is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

JSON to CSV Converter — Free Online JSON to CSV Tool keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use JSON to CSV Converter — Free Online JSON to CSV Tool for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.