Does it auto-detect the delimiter?

Yes. PapaParse auto-detects comma, semicolon, tab, and pipe delimiters.

Can I paste CSV text directly?

Yes. Use the 'Paste CSV' tab to input text directly.

Yes. Type detection converts numeric and boolean strings to their proper JSON types.

Quoted fields are fully supported per the RFC 4180 CSV specification.

Pro and Business users can configure header transformation (lowercase, camelCase, snake_case) in the options panel.

SPREADSHEET

Transform CSV data into structured JSON instantly — auto-detects headers, handles delimiters, processes entirely in your browser.

Files never uploadedInstant conversionNo account needed

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1Drop your CSV file onto the converter above, or click to browse and select a file.
2Adjust any conversion options such as output format, quality, or delimiter settings.
3Click the Convert button. The file is processed instantly in your browser.
4Download your converted JSON file. Your original file is unchanged.

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Your files never leave your device. All processing happens in your browser using WebAssembly.

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No upload wait times, no server queues. Conversion starts immediately and completes in seconds.

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Single-file conversion is always free with no account required. Upgrade for batch processing and more.

Does it auto-detect the delimiter?: Yes. PapaParse auto-detects comma, semicolon, tab, and pipe delimiters.
Can I paste CSV text directly?: Yes. Use the 'Paste CSV' tab to input text directly.
Are numbers and booleans detected?: Yes. Type detection converts numeric and boolean strings to their proper JSON types.
What about quoted fields with commas inside?: Quoted fields are fully supported per the RFC 4180 CSV specification.
Can I set a custom field name transformation?: Pro and Business users can configure header transformation (lowercase, camelCase, snake_case) in the options panel.