CSV ↔ JSON Converter

Convert CSV to JSON and JSON to CSV locally — no upload, perfect for data imports and API work.

CSV input

JSON output

[
  {
    "name": "Alice",
    "email": "alice@example.com",
    "role": "admin"
  },
  {
    "name": "Bob",
    "email": "bob@example.com",
    "role": "user"
  }
]

What this tool does

CSV and JSON are the lingua franca of data imports — convert between formats for APIs, spreadsheets, and CMS bulk uploads.

All conversion runs locally — sensitive customer data never uploads.

How to use it

1
Paste CSV or JSON data into the input area.
2
Select conversion direction: CSV to JSON or JSON to CSV.
3
Copy the converted output — all processing in your browser.

Conversion tips

CSV first row becomes JSON keys — use clear header names without spaces.

Escape quotes in CSV fields properly before converting complex text fields.

Tips

Validate JSON output with json formatter after conversion.
Keep UTF-8 encoding for international characters.

Related tools

All tools →

Add Line Numbers

Add sequential line numbers to any text

Base64 Encoder

Encode and decode Base64 strings

Binary Text Converter

Convert text to binary and back

Caesar Cipher

Shift letters with a classic Caesar cipher

Camel Case Converter

Convert phrases to camelCase

Case Converter

Convert text to uppercase, title case, snake_case & more

Frequently asked questions

Is my data sent to a server?▼

No. Conversion runs entirely locally — sensitive data stays on your device.

Does it handle headers?▼

Yes. CSV first row is treated as column headers when converting to JSON.