CSV to JSON

• 100% Free

  Core tools stay free with no paywall to unlock basics.

• No Registration Required

  Open a tool and start immediately - no account needed.

• Privacy First

  We avoid unnecessary collection and keep processing local when possible.

• Browser Processing

  Most tools run in your browser so your input never needs a server round-trip.

• Fast & Secure

  HTTPS everywhere with instant, client-side results for everyday tasks.

• Mobile Friendly

  Layouts and controls are built for phones, tablets, and desktops.

• Updated Regularly

  Tools and content are improved continuously as the platform grows.

Key Features

• Robust Parsing

  A real state-machine parser handles quoted fields, escaped quotes, and delimiters inside quotes.

• Flexible Output

  Emit an array of objects from a header row, or an array of arrays for raw rows.

• Browser-Local

  Convert sensitive spreadsheets without uploading them anywhere.

How to Use

1. 1

   Paste CSV

   Copy from a spreadsheet, export, or text file.

2. 2

   Set options

   Toggle the header row and choose comma, semicolon, or tab.

3. 3

   Copy or download

   Export the JSON to your clipboard or a .json file.

Use Cases

• Seeding test fixtures from a spreadsheet

  Turn a small CSV of sample rows into JSON objects ready to paste into a test file or mock API response.

• Importing spreadsheet exports into an app

  Convert a CSV export from a spreadsheet or database tool into JSON that your application or script can consume directly.

• Prepping data for a JSON-based API

  Reshape tabular CSV data into an array of objects before sending it to an API that expects JSON payloads.

• Inspecting quoted or comma-containing fields

  Convert a tricky CSV export with quoted commas or escaped quotes into JSON to verify the parser handled each field correctly.

Examples

name,role
Ada,Engineer
Grace,Admiral

[
  { "name": "Ada", "role": "Engineer" },
  { "name": "Grace", "role": "Admiral" }
]

name,title
"Hopper, Grace","Rear Admiral, USN"

[
  { "name": "Hopper, Grace", "title": "Rear Admiral, USN" }
]

Benefits

• ✓Turn spreadsheet exports into API-ready JSON
• ✓Seed test fixtures and config files quickly
• ✓No account, upload, or install required

Best Practices

• Match the delimiter to your source file (semicolon and tab are common).
• Keep the header row on for readable, keyed objects.
• Post-process the JSON if you need numbers or booleans as native types.

Common Mistakes

• Choosing the wrong delimiter and getting a single column.
• Expecting automatic type inference - all values stay as strings.
• Leaving the header toggle on for a file that has no header row.

Privacy Notice

All processing is client-side in your browser. Your CSV is never uploaded to ToolMint servers.

About This Tool

Frequently Asked Questions

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