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CSV to JSON Converter - Online

This tool runs entirely in your browser. Your CSV is never uploaded to our servers.

CSV exports are great for spreadsheets, but APIs and scripts often need JSON—manual conversion tends to break on delimiters, quotes, and inconsistent columns.

Convert CSV into JSON instantly. Supports headers, custom delimiters, and quoted fields. Runs in your browser.

Show detailed guide & explanations▼

Why you may need this tool

CSV is convenient for spreadsheet - style data exchange, but development and testing workflows often require JSON arrays of objects. Converting by hand is time - consuming and introduces errors in quoting, commas, and key names—especially with large datasets. CSV - to - JSON conversion is a practical preparation step that lets you reuse spreadsheet data directly in APIs, fixtures, and scripts.

How to use

Paste CSV, confirm header and delimiter settings, then convert and review the resulting object array.

  1. Paste CSV (or upload a .csv file)
  2. Choose delimiter and header options
  3. Convert and copy or download JSON

Examples

Creating API test payloads from a spreadsheet
Teams often maintain sample data in sheets for convenience. Converting to JSON arrays makes it easy to use the same data in request bodies and automated tests.
Validating delimiter and quoting behavior
CSV values may contain commas, quotes, or newlines. Conversion output helps you identify which rows need cleanup before import or test execution.

Benefits & differentiators

A consistent conversion flow reduces manual editing and makes datasets easier to share within a team. Reviewing the formatted JSON output helps you catch column - mapping mistakes early. It also supports rapid prototyping: you can create sample datasets in a sheet and convert them into JSON inputs for API tests without rewriting structure.

Who this is for

Recommended if you: - build test fixtures from spreadsheet data - import/export datasets between tools - need JSON arrays for API requests - want to reduce quoting and delimiter mistakes

FAQ

Does this support quoted fields and commas inside quotes?
Yes. Quoted fields are handled and commas inside quotes are preserved.
Is my CSV uploaded to a server?
No. Conversion runs entirely in your browser.
Can I convert without headers?
Yes. Disable the header row option to output an array of arrays.
What delimiters are supported?
Auto - detect, comma, tab, semicolon, and pipe are supported.
Why do I get an error?
The CSV may have unclosed quotes or inconsistent columns. Try fixing the input or changing delimiter settings.

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