JSON to Code Generator
Enter JSON, one-click generation of TypeScript interfaces or Python dict code. All processing done locally in your browser.
FAQ
What languages are supported?
Currently supports TypeScript interface definitions and Python dict literals. More language support will be added in the future.
How are nested objects handled?
Nested objects automatically generate corresponding nested interfaces (TypeScript) or nested dicts (Python). In TypeScript mode, each nested object generates a separate interface definition, with Root as the top-level interface name.
How are array types inferred?
If all elements in an array have consistent types, the type is inferred from the first element's structure. Empty arrays generate any[] (TypeScript) or empty lists (Python).
Will my data be uploaded to the server?
No. All conversion is done locally in your browser without uploading any data.
Related guide
JSON, Escape and Markdown Tools: What These Four Pages Do to Your Text Without Asking
All four pages take your text, rewrite it, and never mention it. The JSON formatter turns 1e309 into null and calls that a success; the code generator types every array by its first element, so [1,\"a\"] becomes number[] and duplicate keys become two interfaces with the same name. The HTML escaper knows exactly five characters and double-escapes anything you already escaped. The Markdown preview renders raw HTML, and a single quote in a link URL lets that HTML carry event handlers. Every figure here came from reading these pages' scripts or driving them in a browser.