Convert JavaScript Object to CSV Online - Free, Local & Instant
Instant JavaScript Object (.js) to CSV (.csv) 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 CSV
Data & Dev Config| Specification | JavaScript Object (Source) | CSV (Target) |
|---|---|---|
| Full Specification | ES Module JavaScript Object Literal | Comma-Separated Values (RFC 4180) |
| File Extension & MIME | .js (text/javascript) | .csv (text/csv) |
| Data Typing Model | Unquoted identifier keys, single-quoted strings, ES export default | Flat text columns (auto-inferred numbers & booleans) |
| Structure & Hierarchy | Arbitrarily nested JS objects and arrays | 2D tabular rows (nested keys flattened via dot-notation) |
| Comments Support | Supported (// and /* */) | None |
| Primary Ecosystem | Vite/Webpack configs, TypeScript/JS mock data, Next.js constants | Excel, Google Sheets, pandas DataFrames, BI & analytics imports |
JavaScript Object to CSV — 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,name,email,role,active,score,address.city,address.country 1,Alice Johnson,alice@example.com,admin,true,98.5,Berlin,DE 2,Bob Smith,bob@example.com,editor,false,87,Austin,US 3,Chiara Rossi,chiara@example.com,viewer,true,91.25,Milan,IT
Frequently Asked Questions: JavaScript Object to CSV
How do I convert JavaScript Object to CSV 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 CSV 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 CSV? ▾
When converting hierarchical structures (Arbitrarily nested JS objects and arrays) and tabular or config formats (2D tabular rows (nested keys flattened via dot-notation)), 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 CSV 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 CSV back to JavaScript Object? ▾
Yes! Click the "Swap (CSV → JavaScript Object)" button at the top of the workspace or use the reverse converter link at the bottom of this page for bidirectional conversion.