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CSV to JSON Converter

Convert CSV data to JSON instantly — supports headers, custom delimiters, 100% client-side

Delimiter:

First row is header Pretty print

CSV Input PASTE HERE

JSON Output RESULT

About CSV to JSON Converter

CSV to JSON Converter is a free unit conversion tool that lets you convert csv data to json instantly — supports headers, custom delimiters, 100% client-side instantly. Engineers, students, scientists, and everyday users rely on quick conversions for work, study, and daily life. This tool provides accurate results in real time as you type — no need to press a button or wait for a server response.

How to Use

Paste your CSV data Click inside the left textarea and paste or type your CSV data.

Choose delimiter Select Auto-detect and the tool will figure out the delimiter, or manually pick comma, semicolon, tab, or pipe.

Set options Enable "First row is header" to use the first row as JSON keys. Toggle "Pretty print" for indented, readable output.

Click "Convert" Your CSV is instantly parsed and the resulting JSON array appears on the right.

Copy the result Hit "Copy JSON" to copy the output to your clipboard.

🔒 Privacy note: All processing happens locally in your browser. Your CSV data is never sent to any server.

Frequently Asked Questions

CSV (Comma-Separated Values) is a plain-text format used to store tabular data. Each line represents a row, and values within a row are separated by a delimiter character — most commonly a comma. It is widely used for spreadsheets, database exports, and data interchange between applications.

Yes. The parser correctly handles RFC 4180-style quoted fields. If a field contains the delimiter character, it should be wrapped in double quotes — for example: "Smith, John". The parser will treat the entire quoted value as a single field.

The Auto-detect option scans the first line of your CSV and counts occurrences of comma, semicolon, tab, and pipe — then picks the most frequent one. For European-style CSV files that use semicolons, or TSV (Tab-Separated Values) files, auto-detect handles them automatically. You can also manually select the delimiter if needed.

Yes. Since all processing is done client-side using JavaScript, performance depends on your device. Files with tens of thousands of rows are typically processed in milliseconds. Very large files (hundreds of megabytes) may take a few seconds but will not upload anything to a server.