Convert CSV to JSON for an API

Turn a spreadsheet export into JSON your code or API can consume.

Nid oes angen mewngofnodiMae ffeiliau'n aros yn breifat

Drop a CSV file (or paste below)

CSV, TSV, TXT dim cyfyngiad maint ffeil

Pori ffeiliau

CSV

JSON

—

First row is a headerConvert numbers & booleans

Delimiter

💡 A proper RFC 4180 parser — handles quoted fields, commas and line breaks inside quotes, and escaped quotes. With "first row is a header" on, you get an array of objects; off, an array of arrays. Everything runs in your browser.

APIs tips

🔌

Keep "first row is a header" on to get an array of objects keyed by column name — ideal for APIs.

🔢

Turn on type conversion so numbers and booleans arrive as real JSON types, not strings.

📋

Copy the JSON straight into a request body or fixture.

🔒

Data is parsed in your browser — never uploaded.

Sut Mae'n Gweithio

Dewiswch Ffeil

Drop your file into the tool above. It stays entirely on your device — nothing is sent to any server.

Proses

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Lawrlwythwch

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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Also check out…

📑

Convert Messy CSV with Quotes and Commas

Parse CSV that has commas, quotes, or line breaks

↹

Convert TSV (Tab-Separated) to JSON

Parse tab-separated data copied from a spreadsheet

📥

Prepare CSV Data for Import

Convert a CSV into JSON to seed a database or load

💻

Quickly Inspect CSV as JSON

See CSV rows as structured JSON objects while deve

Cwestiynau Cyffredin

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