What does this tool do?
CSV to JSON converts comma-separated tabular data into an array of JSON objects, where each row becomes an object and each column header becomes a key. It is ideal for anyone who exports data from Excel or Google Sheets and needs to feed it into an API, a database or a JavaScript app.
How to use it
- Paste or type your data into the left field.
- The result is generated instantly on the right.
- Use the Copy button to grab the output.
How it works
The tool reads the first line as headers and turns every following row into a JSON object keyed by those headers. For example, a header of name,age with a row of Alice,30 produces {"name":"Alice","age":"30"}. The result is an array containing all rows, ready to drop into an API request body, a test fixture or an import script without manual retyping.
Edge cases and tips
Fields that contain a comma must be wrapped in double quotes, like "Berlin, Germany". Quotes inside a quoted field are escaped by doubling them. By default every CSV value arrives as a string; if you need real numbers you will convert the output in your own code. Empty cells become empty strings. Everything is processed in your browser, so your data is never sent to any server.
Frequently asked questions
Does the first row need to be a header?
Yes, the tool treats the first row as column headers and uses them as the keys of every object. If your file has no header row, add one before converting.
Can it handle semicolon or tab separated files?
The standard delimiter is the comma. In some regions Excel exports with semicolons; in that case replace the delimiter with commas, or set the tool's delimiter option to something other than a comma if available.
Are numbers and true/false values kept as types?
CSV carries no type information, so every value comes out as a string. The number 30 becomes "30". If you need a real number or boolean, cast it in your own code after conversion.
Is CSV → JSON free?
Yes. CSV → JSON and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. CSV → JSON works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.