📖 What is JSON to YAML?
JSON to YAML converts JSON data into YAML format — a human-friendly data serialization language used widely in DevOps, Kubernetes, Docker Compose, CI/CD pipelines and configuration files. YAML is easier to read and edit by hand than JSON, making it the preferred format for config files. Paste JSON and get clean YAML output instantly. Everything runs in your browser.
💡 Example
Input
{"name":"Alice","roles":["admin","dev"],"config":{"theme":"dark"}}
Output
name: Alice
roles:
- admin
- dev
config:
theme: dark
🛠️ Common Use Cases
- Converting JSON API responses to YAML for Kubernetes manifests
- Transforming JSON config to YAML for Docker Compose files
- Creating CI/CD pipeline configs (GitHub Actions, GitLab CI) from JSON
- Making JSON data human-readable for documentation
- Preparing YAML fixtures from JSON test data
📝 JSON vs YAML Differences
- YAML uses indentation instead of braces and brackets
- YAML supports comments (
#), JSON does not - YAML strings usually don't need quotes
- YAML arrays use
- item syntax instead of ["item"] - YAML supports multi-line strings with
| and >
⚠️ Common Mistakes
- Indentation errors — YAML uses spaces, never tabs. Incorrect indentation changes the structure.
- Strings that look like booleans — YAML interprets
yes, no, on, off as booleans. Quote them if they are strings. - Colon in values — a colon followed by a space is a key-value separator. Values containing
: must be quoted.
❓ Frequently Asked Questions
Why use YAML instead of JSON? ▾
YAML is more readable for configuration files — it supports comments, multi-line strings and is less verbose. JSON is better for data exchange between systems because it is stricter and faster to parse.
Can I convert YAML back to JSON? ▾
Does YAML preserve data types? ▾
Yes — strings, numbers, booleans and null values are preserved during conversion. Be careful with values like "yes" which YAML interprets as boolean true.
Is my data private? ▾
Yes — all processing runs entirely in your browser. Your data is never sent to any server.
Is this tool free? ▾
Completely free — no login, no usage limits, works offline once loaded.
Yes — completely free, no login required, no usage limits.
Is my data private? ▾
Yes — all processing runs in your browser. Your data is never sent to any server.
Does it work offline? ▾
Yes — once the page is loaded, the tool works without an internet connection.