Developer Tools

CSV ↔ JSON Converter

Convert CSV to JSON or JSON to CSV instantly. Paste your data, pick the direction, and copy or download the result — no uploads needed.

No uploads — runs in browserFree & no signupBidirectional conversion

CSV Input

JSON Output

How to convert CSV to JSON (and back)

Convert between CSV and JSON in four simple steps — no account needed.

01
Choose conversion direction
Click 'CSV → JSON' to convert CSV data to JSON, or 'JSON → CSV' to go the other way. The input placeholder updates to show you the expected format.
02
Paste your data
Paste your CSV or JSON into the input panel. For CSV, the first row must be the header row. For JSON, the input must be an array of objects.
03
Click Convert
Hit the Convert button. The result appears instantly in the output panel on the right.
04
Copy or download
Click Copy to copy the result to your clipboard, or Download to save it as a .json or .csv file.

What people use it for

Six situations where converting between CSV and JSON saves time.

Importing data into APIs

Many APIs accept JSON but your data is in a spreadsheet. Convert CSV exports to JSON before sending to an API endpoint.

Spreadsheet exports

Convert JSON API responses to CSV so you can open them in Excel, Google Sheets, or any spreadsheet tool.

Database seeding

Convert CSV data files to JSON arrays for use as seed data in development databases or test fixtures.

Data migration

Move data between systems that use different formats. Convert once and import directly.

Analytics pipelines

Transform CSV exports from analytics tools into JSON for processing with JavaScript or Python scripts.

Config file generation

Convert a CSV of settings or feature flags into a JSON config file for your application.

Frequently asked questions

Everything you need to know about CSV to JSON conversion.

Free, no account, no watermarks.

No. All conversion happens entirely in your browser. Your data never leaves your device, so it stays completely private.

The first row must be the header row with column names. Values can be comma-separated. Values containing commas should be wrapped in double quotes.

The input must be a JSON array of objects, where each object has the same keys. For example: [{"name":"Alice","age":30},{"name":"Bob","age":25}].

The converter handles quoted CSV values correctly. A value like "New York, NY" will be treated as a single field, not split at the comma.

There is no hard limit since processing happens in your browser, but very large files (over 10 MB) may be slow depending on your device.

Yes. The tool works in any modern browser on desktop or mobile.

The converter works best with flat JSON objects. Nested objects will be converted to their string representation. For complex nested structures, consider flattening the JSON first.

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How to convert CSV to JSON (and back)

Convert between CSV and JSON in four simple steps — no account needed.

Choose conversion direction

Click 'CSV → JSON' to convert CSV data to JSON, or 'JSON → CSV' to go the other way. The input placeholder updates to show you the expected format.

Paste your data

Paste your CSV or JSON into the input panel. For CSV, the first row must be the header row. For JSON, the input must be an array of objects.

Click Convert

Hit the Convert button. The result appears instantly in the output panel on the right.

Copy or download

Click Copy to copy the result to your clipboard, or Download to save it as a .json or .csv file.

What people use it for

Six situations where converting between CSV and JSON saves time.

Importing data into APIs

Many APIs accept JSON but your data is in a spreadsheet. Convert CSV exports to JSON before sending to an API endpoint.

Spreadsheet exports

Convert JSON API responses to CSV so you can open them in Excel, Google Sheets, or any spreadsheet tool.

Database seeding

Convert CSV data files to JSON arrays for use as seed data in development databases or test fixtures.

Data migration

Move data between systems that use different formats. Convert once and import directly.

Analytics pipelines

Transform CSV exports from analytics tools into JSON for processing with JavaScript or Python scripts.

Config file generation

Convert a CSV of settings or feature flags into a JSON config file for your application.

Frequently asked questions

Everything you need to know about CSV to JSON conversion.

Free, no account, no watermarks.

No. All conversion happens entirely in your browser. Your data never leaves your device, so it stays completely private.

The first row must be the header row with column names. Values can be comma-separated. Values containing commas should be wrapped in double quotes.

The input must be a JSON array of objects, where each object has the same keys. For example: [{"name":"Alice","age":30},{"name":"Bob","age":25}].

The converter handles quoted CSV values correctly. A value like "New York, NY" will be treated as a single field, not split at the comma.

There is no hard limit since processing happens in your browser, but very large files (over 10 MB) may be slow depending on your device.

Yes. The tool works in any modern browser on desktop or mobile.

The converter works best with flat JSON objects. Nested objects will be converted to their string representation. For complex nested structures, consider flattening the JSON first.