CSV to JSON Converter
Convert CSV data into a JSON array of objects, or turn JSON back into CSV rows — in your browser, with no upload.
How to use the CSV to JSON Converter
- Paste your CSV or JSON data.
- Choose the conversion direction and delimiter.
- Copy the converted output.
About the CSV to JSON Converter
Spreadsheet exports and APIs rarely speak the same format, so this conversion sits between them constantly. The details that break naive converters are quoted fields containing commas, embedded line breaks and inconsistent column counts; those are handled here. The first CSV row is treated as the header and becomes the object keys in the JSON output.
Frequently asked questions
How are the JSON keys decided?
From the first row of the CSV, which is treated as the header row.
Does it handle commas inside quoted fields?
Yes. Quoted fields containing commas and line breaks are parsed correctly.
Is my data uploaded?
No. The conversion runs entirely in your browser.
What happens to commas inside a CSV field?
A field containing a comma should be wrapped in double quotes in the source file, and the converter respects that — the quoted comma stays part of the value instead of splitting the column. If your CSV was written without quoting, those rows will split incorrectly and need fixing at the source.
Can I paste data straight out of Excel or Google Sheets?
Yes. Copy the cells including the header row and paste them in — a spreadsheet table copies as tab or comma separated text, which converts the same way. The first row becomes the JSON keys and every row after it becomes an object.
Related free tools
- Hash Generator — SHA-256 / SHA-1 / SHA-512 of any text.
- Regex Tester — Test regular expressions with live match highlighting.
- Unix Timestamp Converter — Timestamp ⇄ human-readable date.
- Markdown Preview — Live preview of headings, bold, lists, links & code.
- HTML Viewer & Tester — Paste any HTML/CSS/JS and see the live output instantly.
- JWT Decoder — Read the header and payload of a JSON Web Token safely.
Runs entirely in your browser — nothing you enter is uploaded. Last reviewed and updated .