Flattiq – Convert JSON to CSV/Excel Instantly.
Convert JSON to CSV/Excel and CSV/Excel to JSON instantly. 100% free, secure, and browser-based.
Overview
Flattiq is the professional developer's choice for flattening complex JSON structures, cleaning data, and parsing CSV files.
Say goodbye to complex Python scripts or manual data entry. Flattiq automatically detects nested objects and arrays in your JSON data and flattens them into a clean, tabular format ready for Excel or Google Sheets. With a "100% Client-Side" architecture, your data never leaves your browser.
- ✔ Handles deep nesting with dot notation support
- ✔ Respects array structures automatically
- ✔ Preserves data types during conversion
⚙️ Key Features
100% Client-Side Execution
Your data never leaves your browser. Not even a single byte is sent to our servers.
Smart Flattening
Automatically handles deep nesting and arrays so you don't have to manually restructure data.
Blazing Fast
No upload/download wait times. Large files are processed instantly using your CPU.
No Database
We don't have a database to store your files even if we wanted to. Complete privacy.
Developer Ready
Clean output format, accurate data types, and instant JSON validation.
Works Offline
Since it runs in your browser, you can use it even without an internet connection once loaded.
🚀 How It Works
Paste or Upload
Paste your JSON code directly or upload a .json file from your computer.
Configure
Choose specific fields, handle nested arrays, and clean up empty rows.
Export
Download your converted data as CSV or Excel immediately.