Free Online Data Conversion Tools

Convert JSON, CSV, and XML files instantly — no uploads, no signups, everything happens in your browser. Your data never leaves your device.

JSON → CSV Converter

Convert JSON objects and arrays into CSV spreadsheets. Flattens nested data automatically.

CSV → JSON Converter

Parse CSV files and transform them into structured JSON arrays for APIs and applications.

API-Ready Output

XML → JSON Converter

Convert XML documents into clean, readable JSON. Preserves structure and attributes.

Structured Data

JSON → XML Converter

Transform JSON data into well-formed XML documents for legacy systems and SOAP APIs.

Enterprise Ready

Why Use Our Data Conversion Tools?

Working with data means working with different formats. APIs speak JSON, spreadsheets speak CSV, and enterprise systems speak XML. Converting between these formats manually is tedious, error-prone, and wastes time you could spend building.

Our tools solve this:

Instant conversion — paste your data, click convert, get your result. No waiting, no queues.
100% client-side — all processing happens in your browser with JavaScript. Your data never touches a server, never gets stored, never gets logged.
No signup, no limits — use the tools as much as you want, as often as you want. No accounts, no rate limits, no premium tiers.
Works offline — once the page loads, everything runs locally. No internet connection needed after that.
Mobile-friendly — responsive design works on phones, tablets, and desktops equally well.

JSON vs CSV vs XML — When to Use Each Format

Format	Best For	Examples
JSON	Web APIs, configuration files, modern apps	REST API responses, package.json, Firebase data
CSV	Spreadsheets, data analysis, bulk imports	Excel exports, SQL imports, Google Sheets
XML	Enterprise systems, SOAP APIs, document markup	Sitemaps, RSS feeds, legacy enterprise data

Most developers work primarily with JSON today, but CSV remains the universal language of spreadsheets and data import/export, while XML still powers enterprise integrations and document formats. Having reliable converters for all three saves hours of manual reformatting.

Getting Started — Choose Your Conversion

Not sure which tool to use? Here's a quick guide based on what you need:

Exporting API data to a spreadsheet? Use the JSON to CSV converter. Most REST APIs return JSON; convert it to CSV and open directly in Excel or Google Sheets with one click.
Importing a spreadsheet into your app? Use the CSV to JSON converter. Paste your CSV data, and get back a clean JSON array ready for JavaScript, Python, or any API.
Working with enterprise XML data? Use the XML to JSON converter to transform legacy XML feeds and SOAP responses into modern JSON. Or go the other way with the JSON to XML converter when you need to produce XML for downstream systems.
Need to convert in bulk? All four tools work with multi-megabyte files directly in your browser, with no file-size limits and no uploads required.

Data Security — Your Data Stays Yours

Every conversion tool on this site runs entirely in your web browser using JavaScript. We do not upload your data to any server. We do not store, log, or analyze your input. We do not use your data for any purpose whatsoever. You can verify this: open your browser's Developer Tools, go to the Network tab, paste some data, and click convert. You will see zero network requests — everything happens locally.

This is different from many "free online converters" that upload your data to their servers for processing. Those tools can see, store, or mine your data. Ours cannot. The JavaScript that converts your data is visible in the page source and runs entirely on your machine.