Convert JavaScript Object to YAML Online - Free, Local & Instant
Instant JavaScript Object (.js) to YAML (.yaml) 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 YAML
Data & Dev Config| Specification | JavaScript Object (Source) | YAML (Target) |
|---|---|---|
| Full Specification | ES Module JavaScript Object Literal | YAML Ain't Markup Language |
| File Extension & MIME | .js (text/javascript) | .yaml (application/x-yaml) |
| Data Typing Model | Unquoted identifier keys, single-quoted strings, ES export default | Rich dynamic typing (scalars, sequences, mappings) |
| Structure & Hierarchy | Arbitrarily nested JS objects and arrays | Indentation-based nested hierarchy |
| Comments Support | Supported (// and /* */) | Supported (# inline and block comments) |
| Primary Ecosystem | Vite/Webpack configs, TypeScript/JS mock data, Next.js constants | Kubernetes manifests, Docker Compose, GitHub Actions, Ansible |
JavaScript Object to YAML — 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 YAML
How do I convert JavaScript Object to YAML 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 YAML 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 YAML? ▾
When converting hierarchical structures (Arbitrarily nested JS objects and arrays) and tabular or config formats (Indentation-based nested hierarchy), 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 YAML 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 YAML back to JavaScript Object? ▾
Yes! Click the "Swap (YAML → JavaScript Object)" button at the top of the workspace or use the reverse converter link at the bottom of this page for bidirectional conversion.