Timestamp Converter
Convert between Unix timestamps and dates.
YAML / JSON
Convert between YAML and JSON instantly
Switch between formats, validate structures, and keep your configurations in sync.
YAML
JSON
What Is YAML?
YAML (YAML Ain't Markup Language) is a human-readable data serialization format widely used for configuration files in tools like Docker Compose, Kubernetes, Ansible, and GitHub Actions. Its indentation-based syntax is concise but strict -- a misplaced space can break an entire pipeline.
Why Convert Between YAML and JSON?
JSON is the lingua franca of web APIs, while YAML dominates DevOps configuration. When you need to transform a Kubernetes manifest into a JSON payload for an API call, or convert an API response into a YAML config file, this tool makes the round-trip instant and error-free.
How to Use This Tool
- Paste YAML on the left and click YAML → JSON to convert
- Paste JSON on the right and click JSON → YAML to convert
- Drag and drop a
.yaml,.yml, or.jsonfile to auto-populate the correct panel - Parse errors include the line number so you can jump straight to the problem
Privacy and Security
All parsing and conversion runs client-side in your browser. Your configuration data, secrets, and environment variables never leave your machine.
FAQs
What are YAML anchors and aliases?
Anchors (&name) mark a node for reuse, and aliases (*name) reference it. This allows you to avoid repeating the same data. For example, &defaults can define common settings and *defaults can reference them elsewhere in the file.
How do multiline strings work in YAML?
YAML offers several multiline styles: | (literal block) preserves newlines, > (folded block) joins lines with spaces, and quoted strings support escape sequences. The - and + indicators control trailing newline behavior.
When should I use YAML vs JSON for configuration?
YAML is preferred for human-edited config files because it supports comments, is less verbose, and is more readable. JSON is better for machine-to-machine data exchange and APIs because it is simpler, faster to parse, and unambiguous.
Why is YAML indentation so important?
YAML uses indentation (spaces only, never tabs) to denote structure. Incorrect indentation changes the meaning of the document or causes parse errors. Always use consistent indentation (2 or 4 spaces).
Can YAML represent all JSON data?
Yes. Every valid JSON document is also valid YAML (since YAML 1.2). The reverse is not true — YAML features like comments, anchors, and multiline strings have no JSON equivalent.
Is Free YAML to JSON Converter Online — Bidirectional, Instant free to use?
Free YAML to JSON Converter Online — Bidirectional, Instant is completely free and runs in your browser.
Does Free YAML to JSON Converter Online — Bidirectional, Instant send my data to a server?
No. Free YAML to JSON Converter Online — Bidirectional, Instant processes input directly in your browser.
Do I need to create an account to use Free YAML to JSON Converter Online — Bidirectional, Instant?
No account is required to use Free YAML to JSON Converter Online — Bidirectional, Instant.
Privacy-first by design
Tool inputs are processed in your browser. Review the Privacy Policy and Terms for full details.
Related Tools
All ToolsOpen Tool →
JSON to CSV
Convert JSON arrays into downloadable CSV format.
CSV to JSON
Convert CSV data to JSON format instantly.
Case Converter
Convert text between different cases instantly.