# JSON to YAML Converter

> Convert JSON to YAML instantly. Free online tool to format, validate & transform JSON into clean YAML for APIs, Kubernetes, and DevOps workflows.

**URL:** https://calculators.im/json-to-yaml-converter  
**Category:** general  
**Last updated:** 2026-07-03  

Convert JSON to YAML online — fast, free, browser-side. Paste JSON, get clean YAML with correct indentation, type preservation, and quoting for ambiguous values. Built for APIs, Kubernetes manifests, Docker Compose, and Ansible playbooks.

Our JSON to YAML converter transforms any valid JSON document into a clean, human-readable YAML representation in real time. Paste a config object, an API response, or a Kubernetes manifest and instantly see the YAML equivalent — with proper 2-space indentation, automatic quoting for ambiguous strings (yes/no/null/numbers-as-strings), nested array/object rendering, and one-click copy. Validation is built in: invalid JSON shows the exact error position so you can fix and re-convert. Everything runs in your browser, so sensitive payloads (API keys, secrets, JWTs) never leave your device. Use it for DevOps workflows, OpenAPI/Swagger specs, GitHub Actions, Ansible roles, Helm values, or anywhere YAML is preferred over JSON.

## Formula

```
JSON.parse(input) → emit YAML(parsed, indent, quoting)
```

**Variables:**

- **input** — Raw JSON string (object, array, or scalar)
- **JSON.parse()** — Parses and validates JSON per RFC 8259 / ECMA-404
- **emit YAML()** — Walks the parsed tree and emits indented YAML 1.2.2
- **indent** — Number of spaces per level (2 is standard; 4 is occasionally used)
- **quoting** — Strings that resemble booleans, null, or numbers are quoted to prevent YAML type coercion

JSON-to-YAML conversion parses the JSON text into an in-memory structure (objects → maps, arrays → sequences, primitives preserved as-is), then walks that tree emitting YAML syntax level-by-level. Indentation reflects nesting depth. Strings get quoted only when needed — when they contain special characters (`:` `#` `-` `&` `*` `!` `|` `>` `'` `"` `%` `@`), look like another type (`yes`, `no`, `null`, `~`, `on`, `off`, numeric-only), or are empty. Arrays use `- ` prefix; nested arrays/objects increase indent. The result is round-trippable: parsing it back with a YAML parser yields the same data structure as the original JSON.

## Worked Example

### Example: Convert a Kubernetes Pod Manifest from JSON to YAML

The compact JSON manifest is parsed and emitted as standard Kubernetes-style YAML. Nested objects (metadata, spec, labels) increase indent by 2 spaces per level. The containers and ports arrays use `- ` sequence syntax. Image tag `nginx:1.25` contains a `:` but YAML treats it correctly as a string when it follows a key. Apply this YAML directly with `kubectl apply -f pod.yaml` — no further edits needed.

## How to Convert JSON to YAML in 3 Steps: Paste, Format, Copy

1. **Paste JSON** — Paste any valid JSON — object, array, API response, or full Kubernetes manifest. The converter validates as you type.
2. **Convert** — YAML appears instantly with 2-space indentation, type-safe quoting, and proper sequence/map nesting. Pick 4-space indent if your project requires it.
3. **Copy or Download** — Click Copy for clipboard, or Download to save as a `.yaml` file ready to drop into your repo, kubectl apply, or docker compose up.
4. **Validate** — Invalid JSON shows the parser error with line and column. Fix the issue and the YAML output refreshes automatically.

## Pro Tips

- Use 2-space indentation in YAML — tabs are not allowed and cause silent parse failures
- Quote strings that look like booleans (yes/no/on/off/true/false) or null to prevent unwanted type coercion
- Empty values become null in YAML — write `null` or `~` explicitly for clarity in configs reviewed by humans
- Multi-line strings: use `|` for literal blocks (preserves newlines), `>` for folded paragraphs (joins with spaces)
- Comments start with `#` — JSON has no native comment support, so converting back to JSON drops them
- For Kubernetes manifests, YAML is the convention — easier to review in PRs and document inline
- Round-trip safety: JSON → YAML → JSON should preserve data; test with non-trivial inputs before relying on it
- Anchors (&) and aliases (*) let you reuse YAML blocks, but don't survive a round-trip through JSON
- Numeric strings like ZIP codes ("01234") need quoting in YAML — otherwise they become integers and lose leading zeros
- Validate YAML with `yamllint`, `kubectl --dry-run=client`, or `docker compose config` before deploying

## Frequently Asked Questions

### How do I convert JSON to YAML online?

Paste your JSON into the input editor and the converter instantly emits YAML with 2-space indentation. The right-hand pane shows the YAML output; click Copy to put it on your clipboard or Download to save as a `.yaml` file. Conversion runs entirely in your browser — no upload, no server. Choose 2 or 4-space indent depending on your project convention.

### What is the difference between JSON and YAML?

JSON uses braces `{}`, brackets `[]`, and double-quoted keys with explicit punctuation; YAML relies on indentation, dashes for sequences, and infers most types from unquoted values. JSON is stricter and faster to parse; YAML is more human-readable and supports comments. Both represent the same data model (maps, sequences, scalars), so any JSON document has a YAML equivalent. YAML adds anchors, aliases, multi-document streams (---), and explicit type tags (!!str, !!int) that JSON lacks.

### Is YAML better than JSON for configuration files?

For human-edited configs, yes — YAML is easier to read, supports comments, and reduces visual noise (no quotes, braces, or commas). That's why Kubernetes, Docker Compose, GitHub Actions, Ansible, and CircleCI default to YAML. For machine-to-machine APIs, JSON is preferred — strict spec, faster parsers, ubiquitous library support, no indentation traps. Many teams use both: YAML for source-controlled configs, JSON for runtime data interchange.

### Can YAML replace JSON entirely?

Technically yes — YAML 1.2 is a strict superset of JSON, meaning any valid JSON document is also valid YAML. In practice, no: JSON's strictness (no comments, no whitespace ambiguity, no type coercion) is exactly what makes it the right format for APIs, storage, and message queues. YAML's flexibility (aliases, custom tags, indentation) is exactly what makes it the right format for human-maintained configs. Use both, in their respective places.

### Is YAML faster than JSON to parse?

No — JSON parsing is consistently faster across every benchmark and language runtime. JSON's grammar is regular and tightly defined; YAML's grammar is context-sensitive, supports type inference, and has multiple ways to express the same value. For high-throughput scenarios (logs, telemetry, API gateways), choose JSON. For low-frequency human-edited configs, YAML's parsing cost is irrelevant.

### Does YAML support comments?

Yes. Lines (or trailing portions of lines) starting with `#` are comments and are ignored by parsers. Comments are one of YAML's main advantages over JSON for configuration. Note: when you convert YAML to JSON and back, comments are lost — JSON has no comment syntax. If you need comments in JSON-like configs, look at JSONC (used by VS Code) or JSON5.

### Can I convert nested JSON objects to YAML?

Yes — the converter handles arbitrarily deep nesting. Each level of nesting adds 2 spaces of indentation. Arrays of objects, objects containing arrays, and recursive structures all convert correctly. The maximum depth is bounded only by your browser's call stack (typically 10,000+ levels in modern browsers — far beyond any realistic config). Test with your own nested fixtures to confirm round-trip fidelity.

### How do I validate YAML syntax after conversion?

The converter validates the input JSON before emitting YAML, so the output is guaranteed to be valid YAML when the input is valid JSON. To double-check the YAML itself: use `yamllint` (Python CLI), the YAML extension in VS Code (real-time errors), `kubectl apply --dry-run=client -f file.yaml` for K8s manifests, or `docker compose config` for compose files. Watch for indentation regressions if you hand-edit after conversion.

### Why is my YAML invalid after I edit it?

Six common causes: (1) Mixed tabs and spaces — YAML forbids tabs, even one breaks parsing. (2) Wrong indentation level — sibling keys must align exactly. (3) Unquoted strings that look like booleans (yes, no, on, off) or null — get coerced to those types. (4) Trailing whitespace on a line followed by a colon. (5) Missing space after `:` — `key:value` is wrong; `key: value` is correct. (6) A `-` not followed by a space when starting a sequence item. The yamllint tool reports each issue with line and column.

### How do I format YAML correctly with the right indentation?

Use 2 spaces per indent level (the de-facto standard, used by Kubernetes, Ansible, GitHub Actions, and Docker Compose). 4 spaces is occasionally seen in older docs but offers no benefit. Tabs are forbidden. For sequences (`-` items) inside maps, indent the `-` itself by 2 spaces from the parent key. Keep all sibling keys at the exact same column. Configure your editor to insert spaces (never tabs) when you press Tab inside `.yaml` files.

### How do I convert JSON to Kubernetes YAML manifests?

Paste the JSON form of your manifest (often what's emitted by `kubectl get pod -o json` or generated by Helm/Kustomize) into the converter — the YAML output is ready to apply. The converter preserves apiVersion, kind, metadata, and spec hierarchies. After converting, run `kubectl apply --dry-run=client -f manifest.yaml` to confirm Kubernetes accepts it. For Helm chart values files, the same flow applies — convert your values JSON to YAML and drop into `values.yaml`.

### How do I convert JSON to Docker Compose YAML?

Compose files are pure YAML, so converting a JSON service definition gives you a working docker-compose.yaml. Paste a service object (or full top-level JSON with `services:`, `networks:`, `volumes:`) and copy the YAML output to `docker-compose.yaml`. Validate with `docker compose config` — it parses, validates against the Compose Specification, and prints the merged config. Useful when you have programmatic JSON output from another tool that you need to feed Compose.

### Does this JSON to YAML converter work offline or with private data?

Yes — all conversion runs in your browser via JavaScript. No JSON is uploaded to a server, logged, or transmitted anywhere. You can verify by opening DevTools → Network tab: no requests fire when you paste or convert. Safe for API responses with PII, Kubernetes secrets (decoded), JWT payloads, and any other sensitive config. The page itself works offline once loaded — install it as a PWA shortcut for fully air-gapped use.

### Can I convert large JSON files to YAML?

Yes — the converter handles JSON files up to tens of megabytes in modern browsers. Very large files (100MB+) may cause browser tabs to slow; for those, use a streaming command-line tool like `yq` (`yq -p json -o yaml input.json > output.yaml`) or `python -c 'import sys,json,yaml; yaml.safe_dump(json.load(sys.stdin), sys.stdout)'`. For routine API responses, configs, and manifests under 10MB, this in-browser tool is the fastest option.

### What YAML version does this converter target?

YAML 1.2.2 — the latest published spec (October 2021). Key implications: strings like `yes`/`no`/`on`/`off` are NOT auto-coerced to booleans (a YAML 1.1 behavior that broke many configs); only `true`, `false`, and their case variants are booleans. Numeric values follow JSON-compatible parsing. Type tags (!!str, !!int) are emitted only when needed for disambiguation. Most modern parsers (PyYAML 6+, js-yaml, Snakeyaml, Go yaml.v3) target 1.2.

### How does YAML handle types like null, booleans, and numbers from JSON?

Direct mapping: JSON null → YAML null (or empty/`~`); JSON true/false → YAML true/false; JSON numbers → YAML scalars with the same numeric value; JSON strings → YAML strings (quoted only if they would otherwise be misread as another type). Watch for: numeric strings like `"01234"` (must stay quoted to keep leading zero); strings that look like booleans (`"yes"` must stay quoted); empty strings (`""` survives, but YAML `key: ` with nothing after is null, not empty string).

### Should I use 2-space or 4-space indentation in YAML?

Use 2 spaces. It's the convention in Kubernetes, Ansible, GitHub Actions, GitLab CI, Docker Compose, AWS CloudFormation, and almost every YAML-driven tool. 4 spaces wastes horizontal screen space and adds zero readability. Tabs are forbidden by the YAML spec. Configure your editor (.editorconfig: `indent_style = space, indent_size = 2` for *.yaml/*.yml) to enforce this project-wide. The converter outputs 2 spaces by default.

### Can I convert YAML back to JSON?

Yes — use the YAML to JSON Converter (sister tool linked below). Round-tripping JSON → YAML → JSON preserves the data model exactly. The reverse direction (YAML → JSON → YAML) loses YAML-specific features: comments, anchors/aliases (which get expanded), explicit type tags, and multi-document streams. For configs that include comments, keep YAML as the source of truth and treat JSON as a derivative for runtime use.

## Deep Dive

Convert any valid JSON document to clean YAML 1.2.2 instantly — paste, convert, copy. The converter handles deep nesting, preserves types, auto-quotes ambiguous strings (yes/no/null/numeric IDs), and emits 2-space indentation per the Kubernetes, Docker Compose, and Ansible conventions. Everything runs in your browser, so API keys, secrets, and JWT payloads never leave your device. Below: how the conversion works under the hood, JSON vs YAML differences that matter for DevOps, conversion patterns for Kubernetes manifests / Docker Compose / Helm values / OpenAPI specs, common YAML gotchas, and a cheat sheet for round-tripping safely.

### JSON to YAML Converter Online: Convert Any JSON to YAML Instantly

Paste valid JSON — an object, array, scalar, API response, or full Kubernetes manifest — and the converter emits the YAML equivalent **in real time**.

The conversion runs entirely **in your browser** using the native JSON.parse for input validation (per ECMA-404 / RFC 8259), then walks the parsed tree emitting **YAML 1.2.2** syntax.

**2-space indentation** is the default — the de-facto standard across Kubernetes, Ansible, GitHub Actions, and Docker Compose. Switch to 4-space indent if your codebase requires it.

Output is ready to paste into a `.yaml` file or pipe to `kubectl apply -f -`. The right-hand pane shows live byte and line counts so you can sanity-check size before committing.

### How to Convert JSON to YAML: A 3-Step Workflow for Developers

Convert in three steps:

- **Step 1:** Paste your JSON into the editor. The converter validates as you type — invalid JSON shows the exact parser error with line and column.
- **Step 2:** The YAML output appears live in the right pane. No button click needed; every keystroke re-renders.
- **Step 3:** Click Copy (clipboard) or Download (`.yaml` file).

For programmatic workflows, the same logic is exposed via the `/api/calculate` endpoint — POST JSON to it and receive the YAML in the response body.

**Round-trip safety:** convert YAML back to JSON with the sister YAML to JSON Converter; the data model is preserved exactly (comments and anchors are YAML-only and don't survive the round trip).

### JSON vs YAML: Key Differences in Syntax, Performance, and Use Cases

JSON and YAML represent the same data model — maps (objects), sequences (arrays), and scalars (string/number/bool/null) — but with very different surface syntax.

**JSON** is brace-and-quote heavy: every key gets `"`, every map gets `{}`, every array gets `[]`, and every separator is explicit (`:` and `,`). **YAML** is indentation-driven: nesting is implied by 2-space indent, sequences use `- ` prefix, and most strings don't need quotes.

JSON parses 5–10× faster across all major language runtimes, has zero ambiguity, and is the right choice for APIs, message queues, log streams, and storage formats.

YAML supports comments (`#`), anchors and aliases for re-use (`&name` / `*name`), multi-document streams (`---`), and explicit type tags (`!!str`, `!!int`) — strengths that make it the right choice for source-controlled configs, CI/CD pipelines, infrastructure-as-code, and Kubernetes manifests.

Pick JSON for machines, YAML for humans, and convert between them at the boundary.

### Convert Nested JSON Objects to YAML: Arrays, Maps, and Deep Trees

Deep nesting is where JSON-to-YAML conversion earns its keep — tracking braces and indentation by hand at 5+ levels is error-prone.

The converter walks the parsed JSON tree recursively:

- **For each map (object)**, keys are emitted in source order with `key: value` syntax; nested values are indented by 2 more spaces.
- **For each sequence (array)**, items use `- ` prefix; nested objects under a `-` start on the same line as the dash and inherit the next indent level.

Mixed structures — arrays of objects, objects containing arrays of objects, recursively — all render correctly. Maximum depth is bounded only by your browser's call stack (~10,000+ frames in modern browsers, far beyond any realistic config).

Test with your own fixtures: parse the YAML output back to JSON and assert structural equality with the input.

### JSON to Kubernetes YAML: ConfigMaps, Manifests, and Helm Values

**Kubernetes manifests** are the most common use case for this converter. Many tools (kubectl, Lens, k9s, Helm) emit JSON via `-o json` flags; the canonical source-of-truth format committed to Git is YAML.

Paste the JSON output of `kubectl get deployment -o json` and the converter produces a clean manifest ready to commit. apiVersion, kind, metadata, and spec hierarchies preserve exact field ordering.

For **Helm** chart values, paste your JSON values and drop the YAML into `values.yaml` — Helm templates pick it up unchanged. For **Kustomize** overlays, convert your patch object and add to the `patchesStrategicMerge` list.

Validate the output with `kubectl apply --dry-run=client -f file.yaml` before committing — it catches schema-level issues that YAML syntax validation alone would miss.

### JSON to Docker Compose YAML: Service Definitions and Multi-Container Configs

**Docker Compose** files are pure YAML conforming to the Compose Specification (compose-spec.io). When you have programmatic JSON output — from a config generator, a previous Compose v2 export, or a templating script — convert it here and paste into `docker-compose.yaml`.

Top-level keys (`services`, `networks`, `volumes`, `configs`, `secrets`) and their nested specs (image, ports, environment, depends_on, healthcheck) all convert correctly.

Watch for ports: shorthand strings like `"8080:80"` must stay quoted in YAML to prevent parsing as a sexagesimal number — the converter handles this automatically.

Validate with `docker compose config` before `docker compose up`; it parses, merges multiple files, and prints the resolved config exactly as the engine will run it.

### YAML Syntax Rules: Indentation, Anchors, Multiline Strings & Type Coercion

YAML's indentation rules are strict: 2 spaces per level (4 also valid but rare), tabs are forbidden, and sibling keys must align exactly. Sequences (`- item`) and maps (`key: value`) can nest freely.

**Multi-line strings** come in two flavors: literal blocks (`|`) preserve every newline; folded blocks (`>`) join lines with spaces (paragraph-style).

**Anchors** (`&name`) and **aliases** (`*name`) let you define a YAML node once and reuse it elsewhere — common in Compose files for shared service templates.

**Explicit type tags** (`!!str`, `!!int`, `!!bool`, `!!null`) override YAML's auto-typing when you need a string that looks like a number, or vice versa.

The converter quotes ambiguous strings automatically: `"yes"`, `"no"`, `"null"`, `"~"`, numeric-looking values like `"01234"`, and any string containing YAML special characters (`:`, `#`, `-`, `&`, `*`, `!`, `|`, `>`, `'`, `"`, `%`, `@`).

### Validate YAML Syntax: Common Errors, Tab vs Space, and Type Pitfalls

Six errors account for 95% of broken YAML in the wild.

- **(1) Tabs anywhere** — even one tab character breaks parsing. Configure your editor to insert spaces.
- **(2) Inconsistent indentation** — a sibling key off by one column is a parse error.
- **(3) Missing space after `:`** — `key:value` is invalid; `key: value` is correct.
- **(4) Unquoted strings that look like booleans** (`yes`, `no`, `on`, `off`) — get coerced to true/false in YAML 1.1 (older parsers). YAML 1.2 narrowed booleans to `true`/`false` only, but defensive quoting is still wise.
- **(5) Numeric strings without quotes** — `01234` becomes integer 1234, losing the leading zero.
- **(6) Missing space after `-`** — `-item` is a string starting with a dash; `- item` is a sequence entry.

Validate with `yamllint`, the YAML extension in VS Code, or domain-specific validators (`kubectl --dry-run`, `docker compose config`, `ansible-playbook --syntax-check`).

### JSON to YAML Converter for APIs: Response Bodies, OpenAPI, and Swagger

**API workflows** benefit from JSON-to-YAML in two places.

First, OpenAPI 3.x specs are commonly authored in YAML (more readable for path/parameter trees) but exported as JSON for tooling — convert in either direction as your editing flow requires. The converter preserves required fields, schema definitions, $ref pointers, and example bodies.

Second, when documenting an API, paste a sample JSON response and present the YAML version in your docs — easier for readers to scan deeply nested response bodies.

For Swagger UI integration, both `swagger.yaml` and `swagger.json` are accepted; many teams keep YAML in source control and emit JSON at build time. Round-trip safety holds for OpenAPI specs since they don't use comments or anchors in canonical form.

### JSON to YAML for DevOps: Ansible Playbooks, GitHub Actions, and CI/CD

Almost every modern CI/CD platform uses YAML for pipeline definitions:

- GitHub Actions (`.github/workflows/*.yaml`)
- GitLab CI (`.gitlab-ci.yml`)
- CircleCI (`.circleci/config.yml`)
- Travis (`.travis.yml`)
- Drone
- Concourse
- Argo Workflows
- Tekton

When you have a JSON config — from a generator, a previous version control export, or a programmatic builder — paste here and emit YAML.

**Ansible** playbooks specifically lean heavily on YAML's list-of-tasks structure with anchors for reused blocks; the converter outputs sequences cleanly so you can paste under `tasks:` without further edits.

For **GitHub Actions**, the trickiest part is `if:` conditions and matrix strategies — keep the converted YAML, then add comments explaining intent (a YAML-only feature you'll lose if you go back to JSON).

### JSON to YAML Conversion Edge Cases: Comments, Booleans, and Null Values

Five edge cases break naive converters.

- **(1) Comments:** JSON has none, YAML supports `#`. Round-tripping JSON → YAML → JSON is lossless, but YAML → JSON → YAML drops every comment. Keep YAML as your source of truth when comments matter.
- **(2) Boolean coercion:** legacy YAML 1.1 parsers treat `yes`/`no`/`on`/`off` as booleans. Modern parsers (1.2.2) only treat `true`/`false` that way, but defensive quoting prevents surprises.
- **(3) Null:** JSON `null` maps to YAML `null`, `~`, or empty value. The converter emits `null` for clarity; some tools prefer empty (`key:`) but it can be ambiguous with empty strings.
- **(4) Numeric strings:** `"01234"` (a US ZIP code) loses the leading zero if unquoted in YAML — the converter quotes it.
- **(5) Floats with trailing zeros:** `1.50` round-trips as `1.5` because both JSON and YAML use canonical numeric representation. If trailing zeros matter (currency, version strings), serialize as strings.

### JSON to YAML Cheat Sheet: Type Mapping, Style Choices & Round-Trip Tips

**Type mapping at a glance:**

- JSON object → YAML map (block style)
- JSON array → YAML sequence (`-` items)
- JSON string → YAML string (auto-quoted when ambiguous)
- JSON number → YAML scalar with same numeric value
- JSON true/false → YAML true/false
- JSON null → YAML null

**Style choices:**

- prefer block style (multi-line, indented) for readability over flow style (`{key: value, ...}` JSON-like compact)
- use 2-space indent always
- emit keys in source order (matches JSON's behavior)

**Round-trip tips:**

- (1) JSON → YAML → JSON is lossless.
- (2) YAML → JSON drops comments, anchors (expanded), explicit tags, multi-document streams.
- (3) Always quote strings that look like booleans, null, or numbers.
- (4) Test your output with the actual tool that consumes it (kubectl, docker compose, ansible-playbook) — these have stricter validation than generic YAML parsers.
- (5) Keep both versions in source control if your team uses both formats; treat one as canonical (typically YAML for configs, JSON for APIs) and regenerate the other on build.

## Related Calculators

- [yaml-to-json-converter](https://calculators.im/yaml-to-json-converter)
- [csv-to-json-converter](https://calculators.im/csv-to-json-converter)
- [json-formatter](https://calculators.im/json-formatter)
- [regex-tester](https://calculators.im/regex-tester)
- [base64-encoder-decoder](https://calculators.im/base64-encoder-decoder)
- [jwt-decoder](https://calculators.im/jwt-decoder)

## Authoritative Sources

- [RFC 8259 - The JSON Data Interchange Format](https://datatracker.ietf.org/doc/html/rfc8259) — IETF Internet Standard defining JSON syntax, UTF-8 encoding, and parser requirements — authoritative reference for the input format
- [YAML 1.2.2 Specification](https://yaml.org/spec/1.2.2/) — Official YAML specification (October 2021) covering syntax, type system, indentation rules, and core schema — the canonical reference for the output format
- [Kubernetes Documentation - Configuring Containers Using a ConfigMap](https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/) — Kubernetes' official guide for YAML-based configuration, manifests, and ConfigMaps — primary use case for JSON-to-YAML conversion in DevOps
- [Compose Specification - YAML Reference](https://docs.docker.com/reference/compose-file/) — Docker Compose's official YAML reference: services, networks, volumes, and the merge rules used by `docker compose` CLI
- [MDN Web Docs - JSON.parse()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse) — Mozilla's reference for the JavaScript JSON.parse method that powers in-browser conversion, including reviver functions and error handling
- [Ansible Documentation - YAML Syntax](https://docs.ansible.com/ansible/latest/reference_appendices/YAMLSyntax.html) — Ansible's pragmatic guide to YAML for playbooks and inventory files, covering common pitfalls (booleans, indentation, quoting) every DevOps engineer hits

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