Convert CSV to JSON Online

Turn CSV rows into JSON, right in your browser. Paste your data or upload a .csv file and get a clean array of JSON objects, ready for your code.

Your file never leaves your device.

How to convert CSV to JSON

The first row of your CSV becomes the object keys and every following row becomes one object, so your data comes out as an array of JSON objects. Paste the output straight into an API payload, a database import or your app code.

Step 1: Add your CSV
Paste your CSV text or drop in a .csv file.
Step 2: Convert locally
Your data is parsed into JSON right in the browser. Nothing is uploaded.
Step 3: Copy the JSON
Copy the JSON or download it as a .json file.

Good to know

The first row is treated as the header row. The delimiter is detected automatically, including semicolons used by European Excel exports.
Numbers and booleans are typed correctly instead of being kept as strings.
Invalid input is reported with a clear error instead of producing a broken file.

Why use this CSV to JSON converter?

Clean array of objects: the first row becomes the keys and each row becomes one JSON object.
Works with pasted text: no file needed, paste the CSV directly and convert.
100% private: the conversion happens in your browser, your data never leaves your device.
No signup, no queues: paste, convert, copy and get back to work.

Is it free?

Yes. CSV to JSON conversion is completely free, with no signup and no limits on normal use.

Is my file uploaded?

CSV to JSON runs entirely in your browser. Your data is never uploaded to a server and never leaves your device.

About the formats

What is CSV?

CSV (comma-separated values) is a plain-text format that stores tabular data, one row per line and fields separated by commas. It needs no special software: any text editor, spreadsheet application or database can read it. Because of its simplicity, CSV is the universal interchange format between databases, spreadsheets and other programs.

Use CSV whenever you need to move tabular data between systems, exporting a database, importing contacts or sharing a table with someone who uses different software. Choose CSV when plain, predictable data matters more than formatting.

CSV (Comma-Separated Values)

What is JSON?

JSON (JavaScript Object Notation) is a lightweight format for storing and exchanging data as collections of key-value pairs. It grew out of JavaScript but is now supported by nearly every programming language. JSON is the de facto standard for APIs, configuration files and structured data.

Use JSON when machines exchange data, REST APIs, web apps, configuration and tool settings. Its predictable structure makes it easy to parse, so it is the natural choice whenever data needs to be read by software.

JSON (JavaScript Object Notation)