Convert YAML ↔ JSON instantly in your browser.
Bi-directional YAML 1.2 to JSON converter for Kubernetes manifests, Docker Compose configs, and GitHub Actions. Fast, syntax-checked, and 100% private with zero server uploads.
[
{
"apiVersion": "apps/v1",
"kind": "Deployment",
"metadata": {
"name": "api-gateway",
"namespace": "production",
"labels": {
"app.kubernetes.io/name": "api-gateway",
"app.kubernetes.io/part-of": "jsonglow-platform"
}
},
"spec": {
"replicas": 3,
"selector": {
"matchLabels": {
"app": "api-gateway"
}
},
"template": {
"metadata": {
"labels": {
"app": "api-gateway"
}
},
"spec": {
"containers": [
{
"name": "gateway",
"image": "ghcr.io/jsonglow/gateway:v2.4.0",
"imagePullPolicy": "IfNotPresent",
"ports": [
{
"name": "http",
"containerPort": 8080,
"protocol": "TCP"
}
],
"env": [
{
"name": "NODE_ENV",
"value": "production"
},
{
"name": "LOG_LEVEL",
"value": "info"
}
],
"resources": {
"limits": {
"cpu": "1000m",
"memory": "512Mi"
},
"requests": {
"cpu": "100m",
"memory": "128Mi"
}
},
"readinessProbe": {
"httpGet": {
"path": "/healthz",
"port": "http"
},
"initialDelaySeconds": 5,
"periodSeconds": 10
}
}
]
}
}
}
},
{
"apiVersion": "v1",
"kind": "Service",
"metadata": {
"name": "api-gateway-svc",
"namespace": "production"
},
"spec": {
"type": "ClusterIP",
"selector": {
"app": "api-gateway"
},
"ports": [
{
"name": "http",
"port": 80,
"targetPort": "http"
}
]
}
}
]JSONGlow's YAML to JSON converter is a zero-telemetry, 100% in-browser DevOps utility that converts YAML 1.2 manifests, multi-document Kubernetes streams, and Docker Compose configurations into clean, formatted JSON with instant syntax validation.
DevOps & Infrastructure Overview
Bridging the gap between YAML infrastructure and JSON APIs
YAML (YAML Ain't Markup Language) and JSON (JavaScript Object Notation) are the twin backbones of modern cloud infrastructure, container orchestration, and web APIs. When working with Kubernetes manifests, Helm charts, Docker Compose environments, or CI/CD pipelines, translating declarations into formatted JSON via our JSON Formatter or validating strict syntax with our JSON Validator accelerates debugging cycles.
Translating between YAML and JSON is a routine necessity for DevOps engineers, backend developers, and site reliability engineers (SREs). When transforming API schemas into strongly typed contracts, you can seamlessly feed the resulting JSON into our JSON to TypeScript or JSON to Zod generators.
Unlike online converters that send your proprietary infrastructure files, cluster secrets, and API definitions to third-party cloud servers, JSONGlow's YAML to JSON engine operates 100% locally inside your web browser sandbox. Your configuration manifests never cross the network or get stored in external log streams.
JSONGlow supports the complete YAML 1.2 specification, handles complex multi-document streams separated by `---`, and provides preloaded DevOps presets for rapid testing and zero-friction translation.
Workflow Guide
How to convert YAML to JSON and JSON to YAML
Input configuration payload
Paste your Kubernetes manifest, Docker Compose file, GitHub Actions workflow, or JSON API response into the editor. You can also upload .yaml/.yml/.json files directly.
Toggle YAML ↔ JSON & indent
Select conversion mode (YAML → JSON or JSON → YAML), set indentation (2 spaces, 4 spaces, Tab), and choose quote formatting for YAML output.
Deploy to your pipeline
Click 'Copy' to paste directly into kubectl or your IDE, or click 'Download' to save `.json` or `.yaml` files locally without any server transit.
Practical Demonstration
Kubernetes Manifest: YAML to JSON Transformation
See how a multi-layer Kubernetes Deployment configuration translates directly into an RFC 8259 JSON structure suitable for API submission.
apiVersion: apps/v1
kind: Deployment
metadata:
name: web-gateway
labels:
app: web
spec:
replicas: 3
selector:
matchLabels:
app: web
template:
metadata:
labels:
app: web
spec:
containers:
- name: nginx
image: nginx:1.25-alpine
ports:
- containerPort: 80{
"apiVersion": "apps/v1",
"kind": "Deployment",
"metadata": {
"name": "web-gateway",
"labels": {
"app": "web"
}
},
"spec": {
"replicas": 3,
"selector": {
"matchLabels": {
"app": "web"
}
},
"template": {
"metadata": {
"labels": {
"app": "web"
}
},
"spec": {
"containers": [
{
"name": "nginx",
"image": "nginx:1.25-alpine",
"ports": [
{
"containerPort": 80
}
]
}
]
}
}
}
}Syntax Troubleshooting
Common YAML syntax pitfalls & how to fix them
Tab characters in YAML (Tabs are forbidden)
Why it happens: The YAML specification strictly forbids tab characters (`\t`) for indentation. Using tabs instead of spaces triggers parser errors like `Tabs are not allowed as indent`.
# Invalid (Contains \t):
spec:
replicas: 3
# Valid (Spaces only):
spec:
replicas: 3Multi-document stream parsing (--- separator)
Why it happens: Kubernetes manifests often bundle multiple resources (e.g. Deployment + Service) separated by `---`. Standard single-document parsers only read the first document and discard the rest.
Boolean keyword coercion (The Norway Problem: 'no' -> false)
Why it happens: In YAML 1.1, unquoted country codes like `NO` (Norway) or words like `yes`, `no`, `on`, `off` are coerced into boolean `false`/`true`.
# YAML 1.1 Trap:
country: NO # Parsed as false
# Safe:
country: "NO" # Parsed as string "NO"Unquoted strings containing colons (:) or hash (#)
Why it happens: Unquoted strings with `: ` (e.g., `error: message: timeout`) confuse the parser because colons denote key-value mappings.
Core Capabilities
Built for DevOps, SREs & Cloud Engineers
100% In-Browser & Private
All YAML and JSON conversions run entirely inside local browser memory via JavaScript AST engines. Zero telemetry, zero cloud uploads, completely safe for proprietary infrastructure configs.
Bi-Directional Conversion
Convert YAML to JSON or JSON to YAML with a single click. Use the instant Swap tool to reverse workflows without re-pasting data.
Multi-Document Stream Support
Seamlessly parse complex multi-document YAML files separated by `---` (such as Kubernetes Deployment + Service + Ingress manifests) into JSON arrays.
DevOps Presets Library
Preloaded with real-world DevOps templates: Kubernetes Deployments, Docker Compose v3.8, GitHub Actions CI/CD pipelines, and OpenAPI 3.0 specifications.
Interactive Tree Navigation
Explore deeply nested Kubernetes configs, environment arrays, and metadata labels with collapsible tree nodes and type-aware syntax highlights.
Precise Error Coordinates
Instantly locate syntax errors, invalid tabs, unclosed quotes, and indentation mismatches with exact line and column error diagnostics.
Frequently Asked Questions
Common questions answered.
Need more help? Our tools execute entirely in your browser without transmitting any payload to remote servers.
Why convert YAML to JSON for Kubernetes and DevOps?+
While human engineers write YAML for readability in Kubernetes and Docker Compose, the underlying Kubernetes API server, cloud controllers, and automated CI/CD scripts interact with JSON payloads over HTTP. Converting to JSON allows you to validate configurations against JSON Schema, query payloads with jq, or submit to REST APIs.
How does the converter handle multi-document YAML files (---)?+
When your input YAML contains multiple documents separated by `---` (e.g. a Kubernetes Deployment and Service defined in the same file), JSONGlow parses all documents into a structured JSON array containing each individual resource.
Can I convert JSON back into YAML?+
Yes! Switch the toggle to 'JSON → YAML' or click the 'Swap' button. You can customize the output YAML indentation (2 or 4 spaces) and choose your preferred string quote style (plain, single, or double quotes).
Does this tool support YAML 1.2?+
Yes. The parsing engine implements the modern YAML 1.2 specification, avoiding legacy YAML 1.1 scalar traps where country codes like `NO` or `yes`/`off` are mistakenly converted to booleans.
Is my proprietary cloud infrastructure config uploaded to any server?+
Never. All parsing, validation, and conversion executes 100% client-side in your browser. No infrastructure code, environment variables, or secrets are ever sent across the network.
Explore More Tools & Guides
The JSONGlow developer kit.
XML to JSON
Convert XML to structured JSON with attribute prefixes, CDATA handling, and typed values.
JSON to TypeScript
Generate clean TypeScript interfaces or type aliases from any JSON payload automatically.
JSON Formatter
Format, beautify, indent, sort keys alphabetically, and inspect nested JSON structures.