Your data is never sent to a server or stored anywhere. All processing happens in your browser.

CSV to JSON Converter

Delimiter
JSON Output 
 
 
How to Use
 
 
  1. Paste or type your CSV data in the input area.
  2. Select the delimiter used in your CSV (comma, tab, semicolon, or pipe).
  3. Toggle whether the first row contains column headers.
  4. The JSON output updates in real time.
  5. Copy the JSON output with the copy button.
 
CSV Format
 
 
CSV (Comma-Separated Values) is one of the most common data exchange formats. Each line represents a row, and values within a row are separated by a delimiter. Fields containing the delimiter or newlines should be enclosed in double quotes. Double quotes within a quoted field are escaped by doubling them.
 
Output Format
 
 
  • With headers: An array of objects where each key is a column header and each value is the corresponding cell value.
  • Without headers: An array of arrays where each inner array contains the values from one row.
 
Use Cases
 
 
  • Data migration: Convert CSV exports from databases, CRMs, or legacy systems into JSON for import into modern APIs or NoSQL databases.
  • API integration: Transform spreadsheet data into the JSON format required by REST or GraphQL APIs.
  • Spreadsheet processing: Convert Excel or Google Sheets CSV exports into structured JSON for use in web applications.
  • Data analysis: Prepare CSV datasets as JSON for visualization libraries (D3.js, Chart.js) or data processing scripts.
  • Static site generation: Convert CSV content (product catalogs, team directories) into JSON for static site builders.
 
Tips
 
 
  • Ensure your CSV uses consistent encoding (UTF-8 is recommended) to avoid garbled characters in the output.
  • If your data contains commas within values, make sure those fields are enclosed in double quotes in the CSV.
  • For tab-separated data (TSV), select the tab delimiter option.
  • Check that header names are unique — duplicate headers will overwrite values in the resulting JSON objects.
  • Large CSV files may take longer to process. For files with thousands of rows, the conversion still happens entirely in your browser.
 
Privacy
 
 
All conversion happens in your browser. No data is sent to any server.
 
FAQ
 
 
How does the output differ with and without headers?
 
When "First row is header" is on, you get an array of objects where each key is a column header and each value is the cell value. When it's off, you get an array of arrays, each holding one row's values in order.
Is the data I paste sent to a server?
 
No. All CSV-to-JSON conversion happens in your browser, and your data is never sent to a server or stored. You can safely convert sensitive data such as customer lists.
Which delimiters are supported?
 
Comma, tab, semicolon, and pipe (|) are supported. For tab-separated data (TSV), select the tab delimiter.
What if a value contains commas or newlines?
 
That's fine. Fields containing the delimiter or newlines are parsed correctly as long as they're enclosed in double quotes. Double quotes inside a quoted field are escaped by doubling them.
Can it convert large CSV files?
 
Yes. Even CSVs with thousands of rows are converted entirely in your browser. Very large inputs may take a little longer to process, but the data never leaves your device.