CSV to JSON Converter Online Free — Instant

CSV to JSON — convert CSV to a JSON array error runs in your browser · nothing uploaded

Delim

⌃⏎ run · ⎋ clear · / focus input

CSV ⇅ upload

⇅ drop a file to load it

JSON

send output to

no matches

Handles pastes up to ~5MB smoothly in your browser — bigger files still work, just budget a second or two.

CSV to JSON Online

Updated 2026-07-09

Convert CSV to JSON instantly, right in your browser. Paste your CSV and SnapTools returns a clean array of objects as you type, using the header row for keys and respecting quoted fields and your chosen delimiter. Nothing is uploaded: the conversion runs locally, so it is safe for private spreadsheets, exports, and internal data.

Moving tabular data into an application usually means writing throwaway parsing code. CSV to JSON gives you ready-to-use structured output in one step — whether you are feeding an API, seeding test fixtures, or loading data into a JavaScript app.

// how to use

1 Paste or type your CSV into the input panel on the left — conversion runs as you type.
2 Open Settings to pick the delimiter (comma, tab, semicolon, or pipe) so the columns split correctly.
3 Read the JSON array of objects on the right, with keys taken from the header row.
4 Click Copy or Download to save the result.

// examples

Header row becomes object keys

Input

id,name,active
1,Ada,true
2,Linus,false

Output

[
  {
    "id": "1",
    "name": "Ada",
    "active": "true"
  },
  {
    "id": "2",
    "name": "Linus",
    "active": "false"
  }
]

Quoted field with a comma

Input

sku,label
A1,"Bolt, 10mm"

Output

[
  {
    "sku": "A1",
    "label": "Bolt, 10mm"
  }
]

// common uses

Turning a spreadsheet export into JSON for an API Seeding test or fixture data from CSV Loading tabular data into a JavaScript app Inspecting CSV rows as structured objects

// faq

No. The conversion runs in your browser — nothing is uploaded, so it is safe for private spreadsheets and data exports.

The first row of the CSV is treated as the header, and each column name becomes a key in every object. Make sure the header row is present and correct.

Values are kept as strings to avoid changing your data unexpectedly. Parse or cast them in your own code if you need typed values.

Both convert the same parsed rows, but this tool outputs a JSON array of objects while CSV to XML outputs nested XML elements. Pick the format your target system expects.

Standard CSV quoting is respected, so a field wrapped in double quotes can contain the delimiter without splitting. Set the right delimiter in Settings for non-comma files.

// related

JSON to CSV CSV to XML CSV to SQL JSON Formatter CSV Deduplicator

Use this via API

Get a free API key →

curl -X POST https://snaptools.dev/api/v1/tools/csv-to-json \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"csv":"id,name,active 1,Ada,true 2,Linus,false"}'