AI Glossary
JSON Mode
What is JSON Mode?
An output mode available in some LLM APIs that constrains the model to produce valid JSON rather than free-form text. JSON mode makes AI outputs easier to parse programmatically and reduces the need for post-processing. It is commonly used in production AI applications that need to feed LLM outputs into downstream systems.
Example in practice
A developer building an AI that extracts contact details from email signatures would use JSON mode to guarantee the model always returns a parseable object with name, email, and phone fields — eliminating brittle regex parsing.
Learn more
See JSON Mode applied in a professional context through this free course.
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