CSV to JSON Converter
Paste CSV data below and get back clean, properly typed JSON — numbers and true/false values converted automatically, not left as plain text.
Convert CSV to JSON
JSON Output
How to use this tool
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1
Paste your CSV. Copy data from Excel, Google Sheets, or any comma-separated file and paste it into the box.
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2
Set your options. Toggle whether the first row is headers, and pick pretty (readable) or minified (compact) output.
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3
Convert and grab your JSON. Copy it to your clipboard or download it directly as a .json file.
About This Tool
Most quick CSV-to-JSON converters just wrap every value in quotes, so a column of ages comes out as the strings "29" and "34" instead of actual numbers — which breaks sorting, math, and filtering the moment you try to use the data.
This tool automatically detects numbers and true/false values and converts them to their real JSON types, so the output is ready to actually use, not just technically valid.
Frequently Asked Questions
Does this handle commas inside quoted fields?
Yes — a field like "Smith, John" wrapped in quotes in your CSV is treated as one value, not split into two columns.
What if my CSV doesn't have a header row?
Uncheck "First row is column headers" and the tool will generate generic keys like column_1, column_2, and so on.
Why did my number come out as text?
Values with leading zeros (like zip codes) or mixed formatting are kept as text on purpose, since converting them to a number would change their meaning.
Is my data uploaded anywhere?
No. Everything runs locally in your browser. Nothing you paste is sent anywhere or saved after you close the tab.