Free, 100% client-side private JSON Lines (JSONL) to TypeScript Interfaces converter. Transform syntax instantly in your browser with zero data logging, strict AST validation, and CLI support.
export interface RootItem {
id: string
name: string
email: string
role: string
}Paste or type your source JSON Lines (JSONL) syntax into the input editor pane.
The parser validates data structure in real-time, building an in-memory AST without sending any bytes to external servers.
Inspect the formatted TypeScript Interfaces output generated instantly in the output preview pane.
Copy the result to your clipboard, download as a .ts file, or chain it into a multi-step DevFlow pipeline.
100% Client-Side Private: All transformations execute entirely within your browser memory; zero payload logging.
Strict AST Preservation: Retains nested objects, arrays, types, and schema contracts accurately.
Instant Interactive Feedback: Real-time syntax validation with line-specific error reporting.
DevFlow CLI Compatible: Automate identical conversions directly inside your terminal, pre-commit hooks, or CI pipelines.
Run this transformation offline using the high-performance DevFlow CLI inside GitHub Actions, GitLab CI, or pre-commit hooks.
devflow convert jsonl typescript -i data.jsonl -o output.tsConvert between JSONL (JSON Lines / NDJSON) and standard JSON arrays with auto-detection.
Convert JSON to TypeScript interfaces or type aliases instantly.
Generate TypeScript types from GraphQL SDL schema definitions.
Convert OpenAPI/Swagger specs (JSON or YAML) to TypeScript interfaces, types, or Zod schemas.