Paste CSV or upload file. Click Convert. Headers become properties. Auto-detects delimiters. Bi-directional.
CSV to JSON common task. Instant conversion without coding.
First row becomes property names.
Yes, works both directions.
Auto-detects commas, semicolons, tabs.
Depends on device memory.
Convert CSV data to JSON and JSON arrays back to CSV instantly with the Toolzie CSV/JSON Converter. Supports custom delimiters, headers, and nested structures — ideal for data processing, API work, and spreadsheet imports.
Yes — you can specify any delimiter character including comma, semicolon, tab, or pipe.
CSV converts to an array of objects, where each row becomes an object with keys from the header row.
It handles most standard-sized files well. For very large files (10MB+), performance may vary by browser.
Numbers and booleans are detected and preserved in the JSON output. All other values default to strings.