Can it convert CSV back to JSON?

Yes. Switch the toggle to CSV → JSON and paste your CSV; the first row becomes the object keys.

How are nested objects handled?

Nested objects or arrays are serialized as JSON text within a single CSV cell, so no data is lost.

Can I use tabs as the delimiter?

Yes. Choose Tab (for TSV) or Semicolon from the delimiter menu, in addition to the default comma.

Will the CSV open in Excel?

Yes. The output is standard CSV with proper quoting, so it opens in Excel, Google Sheets and similar tools.

Is my data sent to a server?

No. The conversion happens entirely in your browser and nothing is uploaded.

JSON to CSV Converter

Delimiter

JSON input

CSV output

name,age,city
Sam,30,Tokyo
Lee,25,Seoul

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Convert a JSON array of objects into CSV for Excel or Google Sheets, and turn CSV back into JSON for your apps. Values with commas, quotes or line breaks are escaped correctly, and you can pick the delimiter. Everything runs in your browser — your data is never uploaded.

How to use

Choose a direction: JSON → CSV or CSV → JSON.
Pick the delimiter — comma, tab or semicolon.
Paste your data, then copy or download the converted result.

How it works

An array of JSON objects maps neatly onto a table: each object is a row and each key is a column. The converter gathers the union of all keys for the header, then writes each row, wrapping any value that contains the delimiter, a quote or a line break in quotes. Going the other way, the first CSV row becomes the keys and each following row becomes an object.

Features

Two-way conversion

Turn JSON into CSV or CSV into JSON with a single toggle.

Smart headers

Columns are built from the union of all object keys, so missing fields become empty cells.

Correct quoting

Values containing commas, quotes or newlines are escaped per the CSV standard.

Choose the delimiter

Output comma, tab or semicolon separated values to match your target program.

Type inference

When reading CSV, numbers, true/false and null are converted to real JSON types.

When to use it

Open data in Excel

Turn a JSON API response into a CSV you can open directly in a spreadsheet.

Import a spreadsheet

Convert an exported CSV into JSON to load it into your app or script.

Move data around

Switch between formats when migrating records between different systems.

Quick reports

Flatten structured data into a table for a quick, shareable report.

Notes

Nested objects and arrays are written as JSON text inside a single cell.
The first CSV row is treated as the header when converting to JSON.
Numbers, booleans and null are inferred from CSV text automatically.
All processing runs on your device; your data is never uploaded.

FAQ

Can it convert CSV back to JSON?: Yes. Switch the toggle to CSV → JSON and paste your CSV; the first row becomes the object keys.
How are nested objects handled?: Nested objects or arrays are serialized as JSON text within a single CSV cell, so no data is lost.
Can I use tabs as the delimiter?: Yes. Choose Tab (for TSV) or Semicolon from the delimiter menu, in addition to the default comma.
Will the CSV open in Excel?: Yes. The output is standard CSV with proper quoting, so it opens in Excel, Google Sheets and similar tools.
Is my data sent to a server?: No. The conversion happens entirely in your browser and nothing is uploaded.