CSV to JSON Converter
Convert CSV tabular data into structured JSON objects or arrays with automatic type detection.
Batch workspace
Format multiple files locally in one run.
How to use the CSV to JSON
Paste code or file
Paste your raw TEXT text or upload directly.
Configure options
Choose indentation, dialect, or formatting preferences.
Format & export
Click format, then copy, download, or inspect in tree view.
What is a CSV to JSON?
Convert CSV tabular data into structured JSON objects or arrays with automatic type detection. This tool re-indents and organizes code according to standard style conventions while checking for syntax validity. Everything executes 100% inside your browser, guaranteeing zero latency and complete privacy for API keys, user tokens, and confidential database schemas.
Options Explained
| Option | Description |
|---|---|
| First row is header | When checked, the first row columns become keys for an array of JSON objects. When unchecked, outputs a 2D array of rows. |
| Auto-detect numbers & booleans | Converts numeric values to numbers (125000) and 'true'/'false' to booleans instead of raw strings. |
| Delimiter | Specify the column separator or let the parser detect it automatically. |
| JSON Indent | Indentation spaces for formatted JSON (0 for minified JSON). |
Frequently Asked Questions
How does CSV to JSON handle column headers?
When 'First row is header' is enabled, column names from line 1 become the keys of each JSON object in an array.
Can I convert CSV to a 2D JSON array instead of objects?
Yes. Uncheck 'First row is header' to output an array of string/number arrays representing raw grid cells.
Does it convert numbers and booleans automatically?
Yes. With 'Auto-detect numbers & booleans' enabled, numeric strings are cast to JavaScript numbers and true/false to boolean values.
Can it parse Tab-separated (TSV) or semicolon-separated files?
Yes. The delimiter auto-detection detects tabs, commas, semicolons, and pipes automatically, or you can pick one explicitly.
Is my CSV spreadsheet uploaded anywhere?
No. Conversion happens entirely client-side in your browser with PapaParse. Your private data is never transmitted.
Free Developer Cheat Sheet
Download a handy, printable reference guide for CSV to JSON syntax and best practices.
Download Free Cheat Sheet