CSV to JSON Converter Online
Paste or upload a CSV file, and convert it to JSON — quoted fields, commas inside values, and the delimiter are all handled automatically.
Paste your CSV (first row = column headers)
JSON result
Never uploaded
Conversion happens entirely in your browser — your CSV never touches our servers.
Smart parsing
Quoted fields, embedded commas, and the delimiter (comma, semicolon, or tab) are all detected automatically.
Free, no limit
No account, and no limit on how many times you can use it.
What is CSV to JSON Conversion?
CSV to JSON conversion turns a spreadsheet-style table into an array of JSON objects: the header row becomes the set of keys, and every other row becomes one object using those keys. It's a common step when feeding exported spreadsheet data (from Excel, Google Sheets, or a database export) into code, an API, or a JSON-based tool.
How to Convert CSV to JSON Online
- Paste or upload your CSV. Paste directly into the editor, or click "Upload a file" to load a .csv file's contents.
- Click "Convert to JSON." CurePDF reads the header row as keys and parses every remaining row into an object.
- Check the result. The object/field count is shown above the output so you can spot-check it matches what you expected.
- Copy or download. Copy the JSON to your clipboard, or download it as a .json file.
What Gets Parsed Correctly
Real-world CSV files aren't always as simple as splitting on commas — a value can contain a comma, a quote, or even a line break as long as it's properly quoted. This tool uses a real CSV parser (not a naive comma-split) so quoted fields, escaped quotes, and embedded commas or newlines inside a cell all come through correctly. Values that look like numbers or true/false are converted to real JSON numbers and booleans rather than staying as text.
Frequently Asked Questions
How do I convert CSV to JSON?
Paste or upload a CSV file, click Convert, and download the result as a .json file — CurePDF reads the header row as keys and turns every other row into one JSON object.
Does it handle quoted fields and commas inside values?
Yes. Proper CSV quoting (values wrapped in quotes, escaped quotes doubled, commas or newlines inside a quoted field) is parsed correctly, not just split on every comma.
Can it detect the delimiter automatically?
Yes — comma, semicolon, and tab-separated files are all detected automatically; you don't need to specify which one your file uses.
Does the first row have to be a header?
Yes, the first row is always treated as column names, matching how CSV files are used in practice — a header-less CSV should have a header row added before converting.
Are numbers and booleans converted to real JSON types?
Yes — values that look like numbers or true/false become JSON numbers and booleans rather than staying as text, so the output is ready to use in code without extra parsing.
Is my CSV data uploaded anywhere?
No. This tool converts your CSV to JSON entirely in your browser — your data is never sent to CurePDF's servers.
Is the CSV to JSON converter free?
Yes, with no account required and no limit on how many times you can use it.
Can I copy or download the result?
Yes — use the Copy button to copy the JSON to your clipboard, or Download to save it as a .json file.