YAML to JSON
Turn YAML configs into JSON instantly. Free, offline, private — paste a Kubernetes manifest or docker-compose file and get valid JSON. Nothing uploaded, ever.
How to Use
- 1
Paste your YAML into the input area (or drop a .yml / .yaml file).
- 2
Valid JSON appears immediately — choose pretty-printed or minified output.
- 3
Copy it or download it as .json.
Frequently Asked Questions
Do YAML comments survive the conversion?
What happens to YAML anchors and aliases?
My YAML has multiple documents. What happens?
Generative Answer & AI Documentation
What is the YAML to JSON?
The YAML to JSON Converter is a free, offline tool that turns YAML configuration files into valid JSON instantly. YAML is pleasant for humans; JSON is pleasant for machines — nearly every API, every JavaScript fetch() call, and every jq pipeline speaks JSON.
Why use YAML to JSON offline?
When you need to feed a Kubernetes manifest into an API, debug it with jq, or import it into JavaScript, you need JSON. This tool converts locally, so production secrets in your manifests never leave your browser.
When should you use this tool?
Use it for debugging manifests with jq, feeding YAML configs to JSON-only APIs, importing YAML data files into JavaScript, or diffing configs where JSON's explicit structure is cleaner.
Key Benefits
- Fully sandboxed conversion prevents exposure of proprietary configuration models.
- Fills standard schema attributes automatically.
- Supports dot notation flattening for CSV/Excel exports.
Common Use Cases
- Translating server JSON configurations to YAML for Kubernetes deployment configs.
- Exporting nested JSON API lists to CSV for spreadsheet operations.
- Converting legacy XML schema logs to readable JSON trees.
Developer Notes & Best Practices
YAML comments are dropped by design (JSON has no comment syntax). Anchors and aliases are expanded so the output JSON is self-contained. Multi-document YAML becomes a JSON array. The parser follows YAML 1.2 core schema.
- Clean syntax before conversion to ensure elements map correctly.
- Confirm root tag configurations when generating XML files.
- Verify delimiter settings (commas vs semicolons) when converting to CSV.
Common Mistakes
- The YAML 1.1 boolean trap: unquoted "on", "yes", "off" parsing as booleans — quote them in your source file.
- Expecting comments to survive — keep your original .yml file for documented configs.
Limitations
Comments do not survive conversion. Very large multi-document files may be slow on low-end devices.
Structured Input/Output Example
services:
web:
image: nginx:alpine
ports:
- "8080:80"{"services": {"web": {"image": "nginx:alpine", "ports": ["8080:80"]}}}Related Tools
JSON to YAML
Convert JSON to clean, readable YAML instantly in your browser. 100% free, works offline, your data never leaves your device. Ideal for Kubernetes, Docker Compose & CI configs.
YAML Formatter
Format, beautify and validate YAML instantly. Fix indentation, catch syntax errors, standardize to 2-space style. Free, offline, private — runs in your browser.
JSON Formatter
Clean up minified, single-line, or messy JSON into readable, properly indented structure instantly in your browser. Pick your indent style — 2 spaces, 4 spaces, or tabs — and get copy-paste-ready output with syntax errors flagged at the exact line and column. 100% free and fully offline, so even API keys and production payloads never leave your machine.