CSV to JSON Converter — CSV is the lingua franca of spreadsheets; JSON is the language of APIs. Moving data between the two is a daily task for developers, analysts, and marketers alike.
Your data is converted entirely in your browser. It is never uploaded anywhere.
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What is csv to json converter?
CSV is the lingua franca of spreadsheets; JSON is the language of APIs. Moving data between the two is a daily task for developers, analysts, and marketers alike.
This converter parses your CSV into clean JSON objects using the header row as keys — or flattens a JSON array back into a spreadsheet-ready CSV. Quoted fields, embedded commas, and newlines are all handled correctly, and nothing leaves your browser.
How to use it
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Paste your CSV
The first row is treated as column headers. Semicolon and tab delimiters are detected automatically.
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Switch direction
Toggle to "JSON to CSV" and paste a JSON array of objects to get a CSV back.
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Copy the result
Use the copy button to grab the converted output in one click.
Examples
A simple contacts list
CSV with headers becomes an array of objects.
name,email Ada,[email protected] Grace,[email protected]
Result: [{"name":"Ada","email":"[email protected]"},{"name":"Grace","email":"[email protected]"}]
常见问题
Related guides
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How to Merge Multiple CSV Files (And Common Pitfalls)
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The 5 Most Common JSON Mistakes (and How to Catch Them Before Production)
Trailing commas, unquoted keys, single quotes instead of double, comments in JSON, and NaN as a value — the five mistakes that show up in every JSON file that breaks in production. Learn what they are, why parsers reject them, and how to catch them before they ship.
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Last reviewed: 2026-09-24