Free online tool
Free Online JSON to CSV Converter
Convert JSON to CSV online for free. Paste your JSON data, get a downloadable CSV file instantly. No signup, no upload — runs entirely in your browser.
01How it works
Paste your JSON
Paste a JSON array or object into the input field. The converter accepts any valid JSON.
Click Convert
The converter flattens nested objects, extracts all headers, and generates RFC 4180-compliant CSV output instantly.
Download or copy
Click Download to save the CSV file, or Copy to paste it directly into Excel or Google Sheets.
FAQ
Frequently asked questions
What JSON formats are supported?
The converter handles JSON arrays of objects (the most common format), single objects (converted to a 1-row CSV), and nested objects (flattened with dot notation, e.g. address.city). Arrays in values are joined with semicolons.
Does it work with large JSON files?
Yes. The converter runs entirely in your browser with no file size limits. For very large files the conversion may take a few seconds. For automated processing of thousands of files, anyrow's API handles bulk extraction at scale.
Will the CSV open correctly in Excel?
Yes. The output uses UTF-8 with BOM and RFC 4180-compliant quoting so Excel, Google Sheets, and Numbers all open it correctly.
How are nested objects handled?
Nested objects are flattened using dot notation. For example, {"address": {"city": "London"}} becomes a column named "address.city". Arrays in values are joined with semicolons.
Need AI-powered document extraction?
This tool uses client-side processing. anyrow uses AI to extract structured data from PDFs, images, and scanned documents with 99% accuracy. 150 free extractions/month — no credit card required.