CSV to JSON & JSON to CSV Converter
convert · Client-Side
Convert bidirectional data between CSV and JSON formats with auto delimiter detection, table previews, and client-side downloads.
How to Use CSV to JSON & JSON to CSV Converter
Convert bidirectional data between CSV and JSON formats with auto delimiter detection, table previews, and client-side downloads. All processing happens 100% locally inside your web browser using client-side JavaScript. Your files and data are never uploaded to any remote cloud server, guaranteeing complete privacy and zero data leakage.
Drag and drop files or enter text directly into the tool interface.
Executed securely in browser memory with zero upload wait times.
Save your generated file or result immediately with zero watermarks.
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(2)Frequently Asked Questions
Are my CSV or JSON spreadsheets sent to an external server?▼
No. All parsing, conversion, and file generation happen 100% inside your web browser using client-side JavaScript. Your confidential records, customer lists, and financial datasets never leave your device.
Which delimiters are supported in CSV mode?▼
The converter automatically detects or lets you specify Comma (,), Semicolon (;), Tab (TSV), and Pipe (|) delimiters with full support for escaped quotes and multiline fields.
Can this tool parse numbers and boolean true/false values?▼
Yes. You can toggle automatic type casting so numeric values ("100") and booleans ("true", "false") are properly converted to native JSON numbers and booleans rather than strings.
How large of a file can I convert?▼
Because conversion is performed directly in your browser memory, datasets with tens of thousands of rows convert in just a few milliseconds.