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CSV to JSON

Convert CSV data to JSON format online.

.csv Max: 10 MB

Click to upload or drag and drop

Supported: CSV

How to Use CSV to JSON

1

Drop your .csv file into the upload box, or click to browse from your computer - files up to 10 MB are accepted.

2

Check the preview so you can confirm the first row is being used as the field names for every record.

3

Click the "Process" button to convert the rows into a formatted JSON array of objects.

4

Copy the JSON to your clipboard or download it as a .json file, then paste it into your API call, script or seed file.

Features

100% free with no sign-up, account or usage counter
Accepts .csv exports up to 10 MB
Uses the header row as JSON keys automatically
Correctly escapes commas, quotes and newlines inside cells
Copy the output with one click or download it as .json
Runs in your browser, so your data is never uploaded

Frequently Asked Questions

Yes, it is completely free and there is no account, watermark or usage limit to worry about. You can convert as many files as you like.
Processing happens inside your browser, so the file never leaves your computer in the first place. Anything held in memory is cleared when you close or refresh the tab.
Values that are unambiguously numeric come through as JSON numbers, and everything else stays a string. If you need strict control, keeping every value as a string is usually safer for IDs and postcodes.
No. Quoted fields containing commas, quotes or line breaks are parsed properly, so an address such as "12 Baker Street, London" stays one field instead of being split into two.

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About CSV to JSON

Spreadsheets and APIs do not speak the same language. A CSV export gives you a flat grid of rows and columns, while most web APIs, config files and NoSQL databases expect JSON. The CSV to JSON converter bridges that gap: upload a .csv file and it reads the header row for keys, then emits a properly escaped JSON array where every record becomes an object.

Because JSON has no notion of a column, the converter picks sensible defaults. The first row becomes the property names, values stay as strings unless they clearly look numeric, and commas, quotes and line breaks inside individual cells are handled correctly. Files up to 10 MB are processed inside your browser, so even a multi-megabyte export from an analytics tool or a database dump becomes API-ready JSON without being uploaded to a server.

It is a genuinely useful step in data migration: export your customer list from an old CRM as CSV, convert it to JSON, then post it straight to a modern REST endpoint or load it into Firestore, MongoDB or a Laravel seeder.

When to Use This Tool

  • Seeding a database or an API from a spreadsheet export
  • Moving customer, product or order data out of a legacy CRM into a JSON-based system
  • Building test fixtures or mock API responses from a CSV of sample records
  • Feeding a front-end chart or table that expects a JSON array of objects
  • Checking how a spreadsheet will look once it is serialised as JSON