How do I convert CSV to JSON?

Select CSV → JSON mode, paste your CSV data, and the JSON appears instantly. Supports custom delimiters and quoted fields.

How do I convert JSON to CSV?

Select JSON → CSV mode, paste your JSON array of objects, and download the CSV. Nested objects and arrays are automatically stringified.

Does it handle quoted CSV fields?

Yes! Both directions properly handle quoted fields, escaped quotes, and commas inside quoted values.

CSV to JSON Converter

Convert CSV data to JSON instantly with custom delimiters.

CSV Delimiter:

First row is header

CSV Input:

JSON Output:

About CSV to JSON Converter

The CSV to JSON Converter is a client-side data transformation utility built for software developers, data scientists, and analysts. It parses comma-separated (CSV), tab-separated (TSV), and custom delimited tabular files into formatted JSON arrays of objects. Operating entirely in browser memory, it handles multi-megabyte datasets with high performance.

Key features

Auto-Delimiter Detection: Automatically identifies commas, semicolons, tabs, and pipes to parse tables without manual configuration
Type Inference & Parsing: Automatically casts numeric values, booleans, and null fields to native JSON types instead of strings
Dual Output Modes: Choose between an Array of Objects (keyed by header row) or a 2D Array of Rows for compact payloads
100% In-Browser Privacy: Your sensitive financial spreadsheets and customer records never leave your local device

How to use

Paste or Upload CSV: Paste your raw CSV text into the editor or upload a .csv or .tsv file from your device.
Customize Output Format: Toggle type inference, select header parsing, and choose between formatted or minified JSON.
Copy or Download JSON: Inspect the generated JSON tree and click "Copy" or "Download" to save the file.

FAQ

Does this tool handle commas inside quoted values?

Yes, the parser adheres to RFC 4180 specifications, correctly handling escaped quotes, commas inside text fields, and multi-line cells.

Is my CSV file data uploaded to any server?

No, never. All parsing and conversion are executed locally in your browser memory via JavaScript. No data is stored, transmitted, or logged.

Can I convert TSV (Tab-Separated Values) or semicolon-delimited files?

Yes, our automatic delimiter detection identifies tabs, semicolons, pipes (|), and commas automatically.

What is the maximum file size I can convert?

Because processing occurs locally in memory, you can convert multi-megabyte CSV files containing tens of thousands of rows without server timeout errors.

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About CSV to JSON Converter

Key features

Auto-Delimiter Detection: Automatically identifies commas, semicolons, tabs, and pipes to parse tables without manual configuration

Type Inference & Parsing: Automatically casts numeric values, booleans, and null fields to native JSON types instead of strings

Dual Output Modes: Choose between an Array of Objects (keyed by header row) or a 2D Array of Rows for compact payloads

100% In-Browser Privacy: Your sensitive financial spreadsheets and customer records never leave your local device