JSON-CSV Converter

Convert JSON data to Excel-compatible CSV, or CSV to JSON, safely in your browser

이 포스팅은 쿠팡 파트너스 활동의 일환으로, 이에 따른 일정액의 수수료를 제공받습니다.

🔒 All conversions happen in your browser. No data is sent to any server — your sensitive company data stays completely private.

Practical Use Cases

Team Data Exchange

Product managers can save Excel-managed product lists or user data as CSV, convert to JSON, and share with developers. Developers can convert API response JSON to CSV and share back with non-technical team members.

Database Migration

Convert legacy CSV data to JSON for insertion into NoSQL databases (like MongoDB), or convert JSON API data to CSV for relational database imports.

Report Automation

Convert JSON data from APIs to CSV for Excel report preparation. Since processing happens entirely in the browser, sensitive data like revenue figures and customer information stays secure.

Test Data Preparation

Convert test cases or scenario data written in Excel from CSV to JSON, then use directly in API testing tools (like Postman) or automated testing frameworks.

💡 Expert Tips

1

Nested JSON: Nested JSON objects (e.g., address containing city) cannot be directly converted to CSV. Flatten your data first using the JSON Processor tool, or restructure it to include only top-level fields before converting.

2

Large Files: Processing tens of thousands of rows may be slow due to browser memory limits. This tool is optimized for files under 10MB.

3

Privacy First: No data is sent to any server. You can safely convert sensitive company data, customer information, and financial records without any security concerns.

4

Character Encoding: CSV files may show garbled characters when opened directly in Excel. Use Excel's 'Get Data > From Text/CSV' with UTF-8 encoding selected, or use Google Sheets which auto-detects UTF-8.

Frequently Asked Questions

Can I convert nested JSON objects?
CSV is a flat 2D table format, so nested JSON cannot be perfectly converted. For example, a user object containing nested name or address fields is difficult to represent in CSV. You'll need to flatten the data first, or restructure it to include only top-level fields in an array before converting.
Why does my CSV show garbled characters in Excel?
This tool generates UTF-8 encoded CSV files. Double-clicking the file directly in Excel may cause encoding issues. Instead, use Excel's menu: Data > Get Data > From Text/CSV, and select UTF-8 encoding. Google Sheets automatically detects UTF-8 encoding.
What if my data contains commas or line breaks?
PapaParse automatically wraps such fields in double quotes ("), following the RFC 4180 standard. Your data integrity is fully maintained regardless of special characters in the content.
Is my data sent to a server?
Absolutely not. All conversion processing happens entirely in your browser (client-side). You can safely convert sensitive company data, customer information, and financial records without any server transmission.

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JSON-CSV Converter | DDTool