CSV to JSON

Convert CSV data (with quoted fields and embedded commas) into a clean JSON array of objects. Runs entirely in your browser.

How to use CSV to JSON: Open CSV to JSON — it runs entirely in your browser with no setup. Paste or type your input into the text area, or upload a file where supported. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server. Everything runs inside your browser, so your data never leaves your device.

First row contains column headers

Input

0 words · 0 chars

Tip: drag a text file onto the box above to load it — drop several to append them in order.

JSON output

Convert CSV data (with quoted fields and embedded commas) into a clean JSON array of objects. Runs entirely in your browser. CSV to JSON is a free, browser-based tool in the Filevane developer tools collection — there is nothing to install, no account to create and no watermark on your results. It works on desktop, tablet and mobile, and because the work happens on your own device it stays fast even with large inputs.

How to use CSV to JSON

Open CSV to JSON — it runs entirely in your browser with no setup.
Paste or type your input into the text area, or upload a file where supported.
Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
Review the output instantly; large inputs are handled locally without lag.
Copy the result to your clipboard or download it. Your data never leaves the page.

Why use CSV to JSON?

100% free with no limits, no sign-up and no watermarks.
Private by design — your data are processed in your browser and never uploaded to a server.
Fast and lightweight, with instant results even on a phone or a slow connection.
Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
Part of a full developer tools suite, so related csv to json tasks are one click away.

What people use CSV to JSON for

Turning a spreadsheet export into JSON for an API or a script.
Converting exported analytics or billing data into a structure a program can iterate.
Loading a CSV into a JavaScript project without adding a parsing dependency.

CSV to JSON: limits and things worth knowing

Fields containing a comma, a quote or a newline must be quoted in the source, with embedded quotes doubled. That is the actual CSV convention, and it is why a naive split on commas corrupts real-world files.
Everything in CSV is text. Numbers, booleans and dates only become typed values because the converter infers them — check that leading zeros in IDs and postcodes have not been eaten.
The first row is treated as the header and becomes the object keys. Duplicate column names collide, because a JSON object cannot hold the same key twice.
Semicolon-delimited exports are common from European Excel locales, where the comma is the decimal separator.

Is it private and secure?

Your privacy is built in. CSV to JSON runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Working with JSON, XML and YAML: Format, Validate and Convert — Messy config or API response? Learn to pretty-print, validate and convert between JSON, XML, YAML and CSV in seconds.

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