JSON, YAML, CSV, and TOML: When to Use Each Data Format

📰 Dev.to · Celio Bitran

Learn when to use JSON, YAML, CSV, and TOML data formats to efficiently move structured data around in software development

intermediate Published 6 Jul 2026
Action Steps
  1. Choose JSON for web API data exchange due to its widespread support and lightweight syntax
  2. Use YAML for configuration files and human-readable data representation, taking advantage of its comments and hierarchical structure
  3. Select CSV for tabular data storage and exchange, such as spreadsheets and databases, where simplicity and compatibility are key
  4. Apply TOML for configuration files and data storage, leveraging its simplicity, readability, and support for data types
Who Needs to Know This

Software engineers and developers can benefit from understanding the strengths and weaknesses of each data format to make informed decisions when working with APIs, configuration files, and data exchange

Key Insight

💡 Each data format has its strengths and weaknesses, and choosing the right one depends on the specific use case and requirements

Share This
💡 Know when to use JSON, YAML, CSV, or TOML for efficient data exchange and storage in software development

Key Takeaways

Learn when to use JSON, YAML, CSV, and TOML data formats to efficiently move structured data around in software development

Full Article

Software spends a surprising amount of its life just moving structured data around: an API returns...
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