How do I convert CSV to JSON online?

Paste your CSV, click Convert, then copy the JSON output. All processing happens in your browser.

Does this tool use the first row as headers?

Yes. The first row is treated as column names unless your CSV format uses a different structure.

Can I use this for API test data?

Yes. Many developers use this tool to turn spreadsheet exports into JSON fixtures for APIs and automated tests.

Is my CSV uploaded to a server?

No. All processing happens in your browser.

Can I use this for production data?

Yes, but always validate the output in your own pipeline before deploying to production.

CSV to JSON Converter

Paste CSV and get structured JSON for APIs, configs, and test data.

Paste CSV data:

Output

Processes input in your browser Privacy policy

About this tool

This tool converts CSV (comma-separated values) data into structured JSON. It is useful when you need to transform spreadsheet data into API payloads, seed data, or configuration files for applications and scripts. Need the reverse? Use our JSON to CSV converter.

How to use this tool

Paste your CSV into the input area.
Click the convert button to generate JSON.
Copy the JSON result for use in your project.

Example input and output

name,age,city
Alice,30,NYC
Bob,25,LA

?
[
  {"name": "Alice", "age": "30", "city": "NYC"},
  {"name": "Bob", "age": "25", "city": "LA"}
]

Common use cases

Turn spreadsheet exports into API test fixtures.
Convert CSV reports into JSON for scripts and pipelines.
Prepare seed data for development environments.
Quickly inspect tabular data as structured JSON.

Limitations

This tool expects comma-separated values with a header row. Quoted fields, custom delimiters, and very large files may not convert perfectly. Always validate output before production use.

Privacy note

This tool is designed to process input directly in your browser. Do not paste passwords, private keys, or highly sensitive data into any online tool unless you fully understand how it processes data. See our privacy policy.

FAQ

How do I convert CSV to JSON online?: Paste your CSV, click Convert, then copy the JSON output. Processing runs in your browser.
Does this tool use the first row as headers?: Yes. The first row is treated as column names.
Can I use this for API test data?: Yes. Many developers use this tool to turn spreadsheet exports into JSON fixtures.
Is my CSV uploaded to a server?: Conversion is designed to run in your browser. See our privacy policy.
Can I use this for production data?: Always validate the output in your own pipeline before production use.

Last updated: July 2026