JSON to TypeScript Online

Instantly convert JSON to TypeScript online with our powerful TypeGen tool.

Target:

JSON Input

typescript Output

// Your typescript code will appear here...
// Select a target language above.

Client-side generation No data sent to server Instant Results

What is TypeGen?

TypeGen is an advanced online tool designed to convert JSON objects into clean, production-ready types and schemas. Whether you're a frontend developer working with TypeScript, a backend engineer using Go, or need validation with Zod, TypeGen automates the tedious process of manual type definition.

No signup neededRuns offlineZero data collection

Blazing fast

No server round-trips. No loading bars. Just instant results.

Locked-down privacy

Your data stays in your browser. Period.

Zero friction

Open the page and go. No accounts, no upsells, no clutter.

Built for people who value their time

Content creatorsMarketing teamsDesignersDevelopers

The 30-second rundown

Drop it in

Paste text, upload a file, or enter your values.

Tweak if needed

Adjust a setting or two — most defaults just work.

Grab the result

Copy, download, or share. Done in seconds.

How This Works

Below is everything you need to get from zero to done. No fluff, just the steps and features that matter.

What is TypeGen?What is TypeGen? onlinefree what is typegen?what is typegen? tool

How to Use What is TypeGen?

1Paste or type your JSON data into the 'JSON Input' area.
2Select your desired target language from the dropdown (TypeScript, Zod, or Go).
3The tool instantly generates the corresponding code in the output panel.
4Click 'Copy Code' to copy the generated output to your clipboard.

Key Features

TypeScript Interfaces
Generate nested TypeScript interfaces with proper naming conventions and type inference.
Zod Schema Validation
Create Zod schemas for runtime validation, including inferred types for your application.
Go Structs
Convert JSON to Go structs with appropriate json tags, supporting nested objects and arrays.
Client-Side Processing
Your data never leaves your browser. All conversion logic happens locally for maximum privacy.

Making the Most of It

Good times to reach for this: Grab What is TypeGen? when a file needs a quick tweak — a conversion, resize, or cleanup — and you don't want to wait for some desktop monster to boot up.

Typical flow:

Toss your content into the input — text, file, or whatever you're working with.
Dial in the settings that match what you actually need.
Glance over the output to confirm it looks right.
Grab your result: copy, download, or send it along.

Easy traps to avoid:

Feeding in sloppy input and assuming the tool will magically sort out every edge case — always eyeball the output first.
Testing with toy data that looks nothing like your real workload, then getting caught off-guard in production.
Copy-pasting straight into a live project without a ten-second sanity check. That tiny pause saves hours of cleanup.

Your data stays yours: Your files never touch our servers for standard processing. They stay on your device from start to finish.