CSV JSON Converter – Free Online Tool
Convert CSV to JSON and JSON to CSV with quoted-field parsing, nested object flattening, delimiter controls, copy, and download.
Free CSV JSON Converter for Data Cleanup
The CSV JSON Converter handles one of the most common developer and spreadsheet workflows: turning tabular data into JSON and JSON arrays back into CSV. Use it when moving leads, product data, analytics exports, or API test data between spreadsheets and code.
Built for Real CSV and Nested JSON
Basic converters often break on commas inside quotes, escaped quotes, semicolon files, or nested JSON. This tool includes quoted-field parsing, delimiter selection, and dot-notation flattening so the output is easier to use in APIs, dashboards, and spreadsheets.
Best Workflows for Developers and Marketers
Convert spreadsheet rows into API payloads, flatten product feeds, prepare analytics exports, debug webhook examples, and turn JSON responses into CSV for non-technical teammates. Pair it with the JSON Formatter and URL Encoder Decoder for daily debugging work.
Private Browser-Based Data Conversion
CSV and JSON often include customer records, email addresses, internal IDs, or unreleased product data. ToolsMint processes the conversion locally in your browser, so your data is not uploaded to a server.
How to Use CSV JSON Converter
- 1
Choose CSV to JSON or JSON to CSV
- 2
Paste your data, choose the delimiter, and confirm whether the first CSV row contains headers
- 3
Review the output, copy it, or download a .json or .csv file
Frequently Asked Questions
Everything you need to know about the CSV JSON Converter.
Is this CSV JSON Converter free?
Yes. It is free with no signup, watermark, or conversion limit.
Does it handle commas inside CSV fields?
Yes. Quoted CSV fields and escaped quotes are parsed correctly.
Can it convert nested JSON to CSV?
Yes. Nested objects are flattened with dot notation, which makes them easier to export as CSV columns.
Can I use semicolon or tab-delimited data?
Yes. Choose comma, semicolon, or tab as the delimiter.
Is my data uploaded?
No. Conversion runs locally in your browser.
Can I download the output?
Yes. Download JSON when converting from CSV, or CSV when converting from JSON.