Can I use a custom delimiter?

Yes, choose comma, semicolon, tab, or pipe from the options bar.

What if my CSV has no header row?

Turn off the header toggle and rows are converted to plain arrays.

Does this handle quoted fields?

Yes, quoted fields with embedded commas or quotes are parsed correctly.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Csv To Json

Convert between CSV and JSON with delimiter and header options.

Support

Works Offline

Privacy First

No Login

No API

Delimiter

First row is header

CSV input

Output

[
  {
    "name": "Ada",
    "city": "London"
  },
  {
    "name": "Grace",
    "city": "New York"
  }
]

About the Csv To Json

Convert CSV spreadsheets to JSON arrays or JSON arrays of objects back to CSV, with configurable delimiter and header-row handling — all processed locally in your browser.

Examples

Simple CSV

name,city
Ada,London

Output

[{"name":"Ada","city":"London"}]

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser