Convert JSON → TypeScript Online — Free
Generate TypeScript interfaces from any JSON object or array.
Output will appear here
Free plan includes 50 conversions/day. Need more? Talk to us →
What is a .json file?
JSON is a widely-used format in the Developer Tools category. Generate TypeScript interfaces from any JSON object or array. Files in this format are commonly used across various tools, pipelines, and workflows.
What is a .typescript file?
TYPESCRIPT is a popular format in the Developer Tools ecosystem. Converting from JSON to TYPESCRIPT gives you access to its unique features, broader tooling support, and improved interoperability.
How to convert JSON → TypeScript online
Paste your input
Type or paste your source data into the left Input panel.
Auto-convert fires
Results appear automatically as you type (600 ms debounce). Hit Ctrl+Enter to force-convert.
Review the output
Inspect the converted result in the right Output panel.
Copy or download
Click "Copy" to copy to clipboard, or download the output as a file.
Frequently asked questions
Is this JSON to TYPESCRIPT converter free?
Yes. The JSON → TypeScript tool is free for up to 50 conversions per day. Pro (500/day) and Business (unlimited) plans unlock higher limits.
Is my data private? Does anything get uploaded?
Yes — the conversion runs entirely in your browser using JavaScript. Your data never leaves your device. No file is uploaded.
What is the maximum file size for JSON?
You can convert files up to 1 MB. If your file is larger, consider compressing it first or upgrading to a Business plan for increased limits.
What is the difference between JSON and TYPESCRIPT?
JSON and TYPESCRIPT are both formats in the Developer Tools category, each with different use cases, tooling support, and feature sets. Generate TypeScript interfaces from any JSON object or array.
Can I convert multiple files at once?
Batch conversion is available on Pro and Business plans. Free users convert one file at a time.