CSV to JSON
Convert CSV into JSON with object-array and two-dimensional array output modes.
CSV to ExcelExcel to CSVCSV to JSONJSON to CSVMarkdown TableCSV DeduplicateRemove Empty RowsTransposeSort by ColumnSelect ColumnsSplit CSVMerge CSV
Upload Files
Upload one file. Processing stays in the browser.
Active input: -
Paste Input
Paste CSV, JSON, or Markdown table content directly.
Settings
Result Preview
Load data first and generate a result. The preview will appear here.
How to use
Upload CSV or paste the raw content.
Pick array-of-objects or two-dimensional array output.
Copy the generated JSON or download it as a `.json` file.
Best for
Prepare JSON data quickly for frontend or API testing.
Turn sheet data into JSON before feeding scripts or configs.
Verify that CSV headers map cleanly to structured keys.
FAQ
Does the first row have to be headers?
Headers are assumed by default, but you can switch off that option and generate column names automatically.
Can it output a two-dimensional array?
Yes. That mode is useful when you want to preserve a raw matrix shape.
Can the JSON be formatted?
Yes. Readable pretty-print output is enabled by default.