JSON Prompt Generator
Build a prompt that makes any AI return clean, valid JSON — with an explicit schema, field names and types defined for you, ready to paste.
- Defines an explicit JSON schema and fields
- Reduces malformed or partial JSON output
- Great for APIs, automation and data extraction
- Works across ChatGPT, Claude and Gemini
How it works
Describe the data
Say what fields and structure you need back.
Choose JSON output
Pick JSON as the output format in the options.
Paste & run
Get a prompt that returns clean, parseable JSON.
Examples
- Extract name, email and company from a block of text into JSON.
- Return a product listing as JSON with title, price and tags.
- Summarize a review into JSON with sentiment, pros and cons.
Frequently asked questions
How do I get JSON output?
Describe the data you want, then choose the JSON output format in the advanced options. The generated prompt defines the exact schema so the AI returns clean, valid JSON.
Is it free?
Yes — build JSON prompts for free. Pro adds the flagship model, the Optimizer and your library.
Will the output always be valid JSON?
The prompt is engineered to strongly constrain the output to your schema, which greatly reduces malformed JSON — though you should still validate in production.
Related tools
Ready for prompts that just work?
Start free, then upgrade to Pro for the flagship model and the Optimizer.
Start free