CSV to JSON Converter
Paste any CSV text or upload a .csv, .tsv, or .txt file and convert it to a clean JSON array in one click. Supports comma, semicolon, tab, and pipe delimiters with auto-detection. Toggle whether the first row is treated as headers. Copy the result to clipboard or download as a .json file. Everything runs in your browser — nothing is sent to a server.
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Files stay local
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How it works
Paste or upload your CSV
Either paste CSV text directly into the editor, or drop a .csv, .tsv, or .txt file onto the upload zone. The file is read locally — nothing leaves your browser.
Set your options
Choose a delimiter (or let the tool auto-detect it), and toggle whether the first row should be used as JSON keys. The tool handles quoted fields, escaped quotes, and mixed line endings automatically.
Copy or download the JSON
Click Convert to JSON and your result appears instantly. Copy the full JSON to clipboard or download it as a .json file ready to use in your project.
Frequently asked questions
Comma (,), semicolon (;), tab (\t), and pipe (|). Auto-detect picks the most frequent one from the first line, which works correctly for the vast majority of files exported from Excel, Google Sheets, and databases.
Yes. The parser is fully RFC 4180 compliant. Fields wrapped in double quotes are handled correctly, including commas inside quoted fields and escaped double quotes (two consecutive quotes).
Uncheck "First row as headers" and the converter will auto-generate column names (col1, col2, col3…) and include every row as a data object.
No. Everything runs in your browser using the FileReader API. Your CSV data never leaves your device.
.csv, .tsv, and .txt files. You can also paste any delimiter-separated text directly without uploading a file at all.