Upload JSON files or paste JSON text and download as CSV. Flatten nested objects, handle arrays, clean data. Perfect for Excel imports, reports, analytics. 100% browser-based, no server upload.
Drop JSON file or paste JSON text. Files stay in your browser, never uploaded.
Nested objects flattened to columns (user.name → user_name). Arrays handled intelligently.
Remove duplicates, validate emails, fix dates with 14 cleaning tools.
Get clean CSV ready for Excel, Google Sheets, or database import.
JSON from APIs or databases is hard to analyze in Excel. Convert to CSV to use pivot tables, formulas, charts. Business users can work with data in familiar spreadsheet tools instead of coding.
Example: API returns 5,000 orders as JSON → Convert to CSV → Open in Excel → Create pivot table by product → Generate sales chart for presentation.
Many SQL databases (MySQL, PostgreSQL) import CSV faster than JSON. Extract data from NoSQL (MongoDB) as JSON, convert to CSV, then bulk-import to relational databases for analytics.
Example: Export 100k user records from MongoDB as JSON → Flatten nested addresses → Convert to CSV → LOAD DATA INFILE to MySQL → Run SQL analytics.
CSV is universal. Convert JSON reports to CSV for non-technical stakeholders, clients, or legacy systems that only accept CSV. Easy to email, upload to portals, or import to other tools.
Example: Analytics API returns JSON report → Convert to CSV → Email to client → Client opens in Excel → No coding required on client side.
[
{
"name": "John",
"address": {
"city": "NYC",
"zip": "10001"
}
}
]name,address.city,address.zip
John,NYC,10001Nested objects become dot-notation columns in CSV
Upload your JSON file to neatcsv or paste JSON text. The tool flattens nested objects and arrays into CSV columns. Optionally clean the data with 14 tools, then download CSV. Free for up to 10,000 rows (Starter plan, 9€/month).
Nested objects are flattened with dot notation: {user: {name: 'John'}} becomes a column 'user.name' with value 'John'. This allows complex JSON to be represented in flat CSV format for Excel or databases.
Yes. If your JSON is an array of objects, each object becomes a CSV row. If objects have nested arrays, you can choose to: 1) Convert to comma-separated values in one cell, 2) Create separate rows for each array item, or 3) Skip array fields.
neatcsv merges all keys across all objects to create a unified column set. If an object is missing a key, that cell is left empty in the CSV. This handles inconsistent JSON schemas gracefully.
Yes! Click the "Paste JSON" tab after uploading. Paste your JSON text (API response, code output, etc.), and neatcsv will parse and convert it to CSV. Great for quick conversions without saving to a file first.
No. All JSON to CSV conversion happens in your browser using JavaScript. Your file never leaves your computer. This ensures maximum privacy and GDPR compliance.
Perfect for Excel, databases, and reports. From 9€/month.
Start Converting Now