Cron Expression Builder
✨ Visual Cron Builder
✨ Quick Presets
✨ Expression Validation
✨ Next Run Predictions
✨ Manual Entry Support
✨ Syntax Reference
✨ Copy Expression
✨ Real-time Description
✨ Common Patterns
Quick Access
Generated Cron Expression
0 0 * * *Every day at midnight
Quick Presets
Build Expression
Manual Entry
Format: minute hour day_of_month month day_of_week
Next Scheduled Runs
7/13/2025, 12:00:00 AM
7/14/2025, 12:00:00 AM
7/15/2025, 12:00:00 AM
7/16/2025, 12:00:00 AM
7/17/2025, 12:00:00 AM
Cron Syntax Reference
Special Characters
*= Any value,= List separator-= Range/= Step values
Examples
*/15= Every 15 units1-5= Monday to Friday0,30= At 0 and 30L= Last day of month
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 cron expression?
A cron expression is a string of 5 fields (minute, hour, day, month, day-of-week) that defines when a scheduled task should run in Unix-like systems.
What do the 5 fields represent?
The fields are: minute (0-59), hour (0-23), day of month (1-31), month (1-12), and day of week (0-7, where 0 and 7 are Sunday).
What does the asterisk (*) mean?
The asterisk (*) means 'any value' or 'every'. For example, * in the hour field means 'every hour'.
How do I create an expression for every 15 minutes?
Use */15 in the minute field and * for all other fields: */15 * * * *. This runs every 15 minutes of every hour.
Can I schedule tasks for weekdays only?
Yes! Use 1-5 in the day-of-week field to run Monday through Friday, or select 'Weekdays' from the dropdown.
How accurate are the 'Next Runs' predictions?
The predictions show estimated next execution times based on the current time and your cron expression. For complex expressions, use a dedicated cron library for precise calculations.
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