JWT Decoder & Encoder
✨ JWT Token Decoding
✨ JWT Token Encoding
✨ Header & Payload Inspection
✨ Token Validation
✨ Expiration Checking
✨ Custom Claims Support
✨ Copy Individual Sections
✨ Sample Token Loading
✨ No Data Stored
Quick Access
Mode
About This Tool
Our JSON to CSV Converter is a powerful, free online tool that transforms JSON (JavaScript Object Notation) data into CSV (Comma-Separated Values) format. Whether you're a developer working with APIs, a data analyst processing datasets, or anyone who needs to convert structured data for use in spreadsheets, this tool provides a quick and reliable solution.
Key Features:
- Instant Processing: Convert JSON to CSV in real-time as you type or paste data
- Nested Object Support: Option to flatten complex nested JSON structures
- Flexible Delimiters: Choose from comma, semicolon, tab, or pipe separators
- Header Control: Include or exclude column headers as needed
- Direct Download: Save your converted CSV file directly to your device
- Copy to Clipboard: Quickly copy results for use in other applications
- Privacy First: All processing happens in your browser - no data uploaded
Perfect For:
- Converting API responses for spreadsheet analysis
- Preparing data for Excel or Google Sheets import
- Transforming database exports
- Creating reports from JSON data
- Data migration and ETL processes
How to Use
- Prepare your JSON data:Ensure your JSON is formatted as an array of objects. Each object represents a row, and object properties become columns.
- Paste or type your JSON:Enter your JSON data in the input textarea. You can also click "Load Sample" to see an example or upload/drag & drop a JSON file.
- Configure options:
- Toggle "Include Headers" to add/remove column names
- Enable "Flatten Nested Objects" for complex JSON structures
- Select your preferred delimiter (comma, semicolon, tab, or pipe)
- Review the output:The CSV will be generated automatically in the output area.
- Export your data:Click "Download CSV" to save the file, or "Copy" to copy it to your clipboard.
💡 Pro Tips:
- • Use the sample data to understand the expected JSON format
- • For nested objects, try the "Flatten" option to create separate columns
- • Choose semicolon delimiter for Excel compatibility in some regions
- • Large datasets? Consider processing in smaller batches for better performance
⚠️ Common Issues & Solutions:
JSON parsing error: Unexpected token
Check for missing quotes, trailing commas, or invalid JSON syntax. Use the sample data as a reference.
Nested objects not flattening correctly
Enable the 'Flatten Nested Objects' option and ensure your JSON structure is consistent across all objects.
CSV output has extra columns
This happens when objects have different properties. Consider normalizing your JSON data first.
Special characters not displaying correctly
Ensure your JSON is properly encoded in UTF-8 and avoid using control characters.
🚀 Advanced Use Cases:
- • API Response Processing: Convert paginated API responses into CSV for bulk analysis
- • Log File Analysis: Transform JSON log entries into CSV for spreadsheet analysis
- • Database Migration: Convert JSON exports to CSV for importing into relational databases
- • Report Generation: Create CSV reports from JSON data for stakeholder distribution
- • Data Transformation: Prepare JSON data for machine learning models that expect CSV input
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Frequently Asked Questions
What is a JWT token?
JWT (JSON Web Token) is a compact, URL-safe means of representing claims between two parties. It consists of three parts: header, payload, and signature, separated by dots.
Is it safe to decode JWT tokens here?
Yes! All decoding happens entirely in your browser - no data is sent to our servers. Your JWT tokens remain completely private and secure.
Can I validate JWT signatures?
This tool focuses on decoding and encoding JWT structure. For signature validation in production, use proper JWT libraries with your secret keys on your server.
What JWT algorithms are supported?
The tool can decode any JWT regardless of algorithm. For encoding, it creates unsigned tokens or simple demonstrations - use proper JWT libraries for production signing.
How do I check if a JWT is expired?
The tool automatically checks the 'exp' claim in the payload and shows whether the token is expired or still valid.
Can I create custom JWT claims?
Yes! In encode mode, you can customize both the header and payload with any JSON data you need for your JWT token.
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