Convert JavaScript Object to NDJSON Online - Free, Local & Instant
Instant JavaScript Object (.js) to NDJSON (.ndjson) converter. 100% client-side processing in your browser RAM — zero file uploads, full privacy, drag & drop or paste raw text.
Technical Comparison: JavaScript Object vs NDJSON
Data & Dev Config| Specification | JavaScript Object (Source) | NDJSON (Target) |
|---|---|---|
| Full Specification | ES Module JavaScript Object Literal | Newline-Delimited JSON (JSON Lines / JSONL) |
| File Extension & MIME | .js (text/javascript) | .ndjson (application/x-ndjson) |
| Data Typing Model | Unquoted identifier keys, single-quoted strings, ES export default | One self-contained JSON record per line |
| Structure & Hierarchy | Arbitrarily nested JS objects and arrays | Streamable sequence of structured JSON objects |
| Comments Support | Supported (// and /* */) | None |
| Primary Ecosystem | Vite/Webpack configs, TypeScript/JS mock data, Next.js constants | BigQuery imports, LLM fine-tuning datasets, Logstash/Elastic streams |
JavaScript Object to NDJSON — Before & After Example
const data = [
{
id: 1,
name: 'Alice Johnson',
email: 'alice@example.com',
role: 'admin',
active: true,
score: 98.5,
address: {
city: 'Berlin',
country: 'DE',
},
},
{
id: 2,
name: 'Bob Smith',
email: 'bob@example.com',
role: 'editor',
active: false,
score: 87,
address: {
city: 'Austin',
country: 'US',
},
},
{
id: 3,
name: 'Chiara Rossi',
email: 'chiara@example.com',
role: 'viewer',
active: true,
score: 91.25,
address: {
city: 'Milan',
country: 'IT',
},
},
];
export default data;
{"id":1,"name":"Alice Johnson","email":"alice@example.com","role":"admin","active":true,"score":98.5,"address":{"city":"Berlin","country":"DE"}}
{"id":2,"name":"Bob Smith","email":"bob@example.com","role":"editor","active":false,"score":87,"address":{"city":"Austin","country":"US"}}
{"id":3,"name":"Chiara Rossi","email":"chiara@example.com","role":"viewer","active":true,"score":91.25,"address":{"city":"Milan","country":"IT"}}
Frequently Asked Questions: JavaScript Object to NDJSON
How do I convert JavaScript Object to NDJSON online without uploading sensitive files? ▾
Paste your JavaScript Object data or drag and drop a .js file into the converter above. ZeroUpload parses JavaScript Object and serializes NDJSON 100% inside your browser RAM using local JavaScript—no bytes are ever sent to an external server.
How are nested objects or tabular columns mapped between JavaScript Object and NDJSON? ▾
When converting hierarchical structures (Arbitrarily nested JS objects and arrays) and tabular or config formats (Streamable sequence of structured JSON objects), our engine automatically flattens or unflattens dot-separated keys (such as address.city) and preserves numbers, booleans, arrays, and null values.
Is this JavaScript Object to NDJSON converter free for commercial and production config files? ▾
Yes. The tool is completely free, requires no account or API key, and works offline once loaded. Because execution happens in local memory, it is safe for proprietary JavaScript Object, database exports, and production secrets.
Can I convert NDJSON back to JavaScript Object? ▾
Yes! Click the "Swap (NDJSON → JavaScript Object)" button at the top of the workspace or use the reverse converter link at the bottom of this page for bidirectional conversion.