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CSV to JSON Converter

Spreadsheets are everywhere, but most applications and APIs expect JSON. This free CSV to JSON converter turns pasted comma-separated data into a clean JSON array of objects — with the header row as your keys, and commas, quotes and line breaks handled correctly. Paste it, convert it, or download it — no server involved.

CSV input

Output format

JSON output

What is a CSV to JSON Converter?

A CSV to JSON converter reads a comma-separated values file, where the first row holds column names and the rows below hold data, and turns it into JSON. The most common output is an array of objects: each column heading becomes a key, and every data row becomes an object, so a table like name,age with a row Alice,30 becomes {"name":"Alice","age":"30"}.

It is the bridge between spreadsheets and code. CSV is how Excel and Google Sheets deliver data, but JSON is how web apps and APIs consume it. A converter does the boring, error-prone work for you: it parses quoted fields, unescapes doubled "" quotes, and preserves values that contain a comma or a line break. Because it all runs on your device, you can convert customer data or database dumps without uploading anything.

How to use the CSV to JSON Converter

Paste your CSV data — header row and all — into the input area. You can copy cells straight from a spreadsheet.
Pick an output format: Array of objects uses the header row as keys, Array of arrays keeps each row as a simple list.
Click Convert to JSON.
Read the formatted JSON in the result area.
Click Copy to put it on the clipboard, or Download to save a .json file. Use Clear to start a fresh conversion.

Example

Paste this CSV — note the quoted city, the doubled quote and the empty cell:

name,age,city,note Alice,30,New York,"Likes jazz, coffee" Bob,25,"London, UK","Said ""hi""" Carol,35,Berlin,

The converter produces this array of objects:

[{"name":"Alice","age":"30","city":"New York","note":"Likes jazz, coffee"},{"name":"Bob","age":"25","city":"London, UK","note":"Said \"hi\""},{"name":"Carol","age":"35","city":"Berlin","note":""}]

The header row becomes the keys, every data row becomes one object, and commas, quotes and blanks survive intact.

Who is a CSV to JSON converter for?

Anyone who regularly moves data between spreadsheets and applications. It is built for the people who hit the same wall every time: the data lives as comma-separated text, but the API, dashboard or database wants JSON.

Developers: Frontend, backend and full-stack engineers who consume CSV exports from a vendor, an admin panel or a bulk upload and need an array of objects ready to pass to `fetch`, a database seed script or a scheduler. A converter lets you shape the payload without writing a parser.
Data analysts: Analysts and BI folks who pull CSVs out of spreadsheets or reporting tools and need JSON to feed a charting library, a notebook or a visualization pipeline. Array-of-objects output maps cleanly to a table or a chart dataset.
QA and test engineers: Testers who need realistic JSON fixtures for API tests, load tests or mock servers. Pasted CSV becomes a valid JSON body in seconds, with tricky quoted fields handled automatically.
Anyone migrating data: Teams moving from legacy CSV-based systems to JSON APIs, JSON documents or NoSQL stores. Because the conversion runs entirely in your browser, you can convert anything from a list of contacts to a client database without uploading it anywhere.

Common use cases

Preparing a spreadsheet export as JSON for an API or web app.
Converting Google Sheets or Excel data into objects for a database seed script.
Turning CSV reports into JSON for real-time dashboards or front-end charts.
Migrating data between legacy CSV files and modern JSON-based services.

Pro tips

Make sure your first row is a unique header — duplicate or empty column names will produce duplicate or empty keys in every object.
If a field contains a comma, quote or newline, wrap it in double quotes; the parser keeps it as one value.
Use the array-of-arrays format when the header names are not reliable, then map the lists yourself.
Check the row and object count in the status message to confirm nothing was skipped before you download.

Delimiter and edge-case handling

CSV has no type system — a comma, quote or newline inside a field can silently split a row if it is not quoted. This converter follows the common RFC-style rules, so below is exactly how each tricky case is parsed.

What the CSV contains	How the parser handles it
A plain comma `name,age`	A comma outside quotes separates fields, so `Alice,30` becomes two values `["Alice","30"]`.
A quoted field `"New York"`	The surrounding double quotes are stripped, leaving a single value `New York`.
An embedded comma `"Likes jazz, coffee"`	Inside quotes the comma is literal, so the whole phrase stays one value and the row is not split.
An escaped quote `"Said ""hi"""`	A doubled quote `""` unescapes to a single `"`, producing `Said "hi"`.
An embedded newline `"line1 line2"`	Inside quotes a line break is kept as part of the value, so a quoted newline does not end the row.
A missing final value with a header row	A row shorter than the header fills the missing keys with an empty string, so `Alice,30` with header `name,age,city` becomes `city:""`.

FAQ

What is CSV to JSON conversion?

It is the process of turning a comma-separated values file, which has a header row and data rows, into JSON — usually an array of objects where each column name becomes a key and each data row becomes an object.

Does it handle commas or quotes inside a field?

Yes. The parser reads quoted fields and escaped double quotes correctly, so values that contain commas, quotes or line breaks are preserved as a single value.

What output formats can I choose?

You can switch between an array of objects, where the header row becomes the keys, and an array of arrays, where every row is simply a list of values.

Will numbers be converted to numbers?

By default every value is kept as a string, which is the faithful conversion because CSV has no type information. You can post-process the JSON if you need numeric types.

Can I download the result as a file?

Yes. Click Download to save a .json file you can open in any editor, or curl back into an application or API.

Is my CSV uploaded or stored?

No. The conversion runs entirely in your browser, so your data never leaves your device.

Does it need a header row?

For the array-of-objects format, yes — the first row becomes the keys. If you use the array-of-arrays format the header row is included as the first list.

Can I paste CSV directly from Excel or Google Sheets?

Yes. Copy the cells from your spreadsheet and paste them in the input area; they arrive as comma-separated and tab-separated values are handled as well.

Is it free?

Yes, free and unlimited with no signup required.