> JSON ⇄ YAML <
// Convert between JSON and YAML formats instantly
JSON ⇄ YAML
Convert in both directions. JSON to YAML and YAML to JSON with a single click or auto-detect on paste.
Syntax Check
Validates your input before conversion. Clear error messages help you fix JSON or YAML syntax issues.
No Limits
100% client-side processing. No file size limits, no server uploads. Your data never leaves your browser.
// ABOUT JSON & YAML
JSON vs YAML:
JSON (RFC 8259) is a lightweight data-interchange format using key-value pairs with braces and brackets. YAML (YAML 1.2) is a human-friendly data serialization standard that is a superset of JSON. YAML is widely used in configuration files for Docker, Kubernetes, CI/CD pipelines, and more.
Example:
{"name":"John","age":30} → name: John
age: 30
Common Use Cases:
- >Docker Compose and Kubernetes manifests
- >CI/CD pipeline configurations (GitHub Actions, GitLab CI)
- >Application configuration files
- >API response format conversion
- >Infrastructure as Code (Ansible, Terraform)
>> frequently asked questions
Q: What is the difference between JSON and YAML?
A: JSON uses braces, brackets, and quotes for structure, making it strict and machine-friendly. YAML uses indentation and minimal punctuation, making it more human-readable. YAML supports comments, multi-line strings, and anchors/aliases that JSON does not.
Q: When should I use YAML over JSON?
A: Use YAML for configuration files that humans read and edit frequently (Docker Compose, Kubernetes, CI/CD). Use JSON for data interchange between systems, APIs, and when strict parsing is important.
Q: Is YAML a superset of JSON?
A: Yes, since YAML 1.2, every valid JSON document is also valid YAML. This means a YAML parser can parse any JSON document, but not vice versa.
Q: What are YAML anchors and aliases?
A: YAML anchors (&) and aliases (*) let you define a value once and reference it multiple times, reducing duplication. For example, &default defines an anchor and *default references it elsewhere in the document.
Q: What are common YAML gotchas?
A: Common pitfalls include: indentation must use spaces (not tabs), 'yes/no/on/off' are parsed as booleans, unquoted strings with colons can break parsing, and trailing whitespace can cause issues. Always quote ambiguous values.