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.
CSV to JSON
Convert CSV into JSON instantly. Supports headers, custom delimiters, and quoted fields. Runs in your browser.
CSV exports are easy to share, but APIs, scripts, and test fixtures often need JSON. Manual conversion is slow and usually breaks on quotes, delimiters, or uneven columns.
How to use
Paste CSV, confirm header and delimiter settings, then convert and review the resulting object array.
- Paste CSV into the input area.
- Choose auto - detect or set the delimiter manually.
- Decide whether the first row should be treated as headers.
- Copy or download the generated JSON.
Why this tool is useful
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.
What this tool helps with
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.
Examples
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.
Recommended 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
Privacy and processing
This tool runs entirely in your browser. Your CSV is never uploaded to our servers.
Frequently Asked Questions
Does this support quoted fields and commas inside quotes?
Yes. Quoted fields are handled correctly, including delimiters inside quoted values.
Is my CSV uploaded to a server?
No. Conversion runs entirely in your browser.
Can I convert CSV without headers?
Yes. If you turn off the header option, the output becomes 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 contain unclosed quotes or broken row structure. Check the input and delimiter selection.
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