YAML to JSON Converter
Convert YAML to JSON and back — config-friendly and accurate, 100% in your browser.
About YAML to JSON Converter
Paste YAML and get JSON, or switch direction to turn JSON into clean YAML. It supports the full YAML data model — nested mappings, sequences, scalars and booleans — and reports syntax errors with a message so you can fix them quickly.
Useful for working with Kubernetes manifests, CI pipelines, Docker Compose and other config files. Everything runs locally in your browser; nothing is uploaded.
How to use YAML ⇄ JSON
- Select YAML to JSON or JSON to YAML and enter a complete value.
- Inspect scalar types and nesting before copying the converted result; load the sample if indentation is unclear.
Limitations and common mistakes
YAML supports syntax and types that JSON cannot directly express. Comments, aliases and presentation choices are not preserved as JSON source text.
Quote values that must remain strings, such as identifiers with leading zeros. Review dates, duplicate keys and multi-document YAML against the parser behavior required by your project.
The tool processes its input locally on your device. Read our privacy policy for analytics, storage and network details.
YAML to JSON
name: Ada langs: - en - fr
{ "name": "Ada", "langs": ["en", "fr"] }Switch direction to convert JSON back into YAML.
Frequently asked questions
Does it support the full YAML spec?
It uses a complete YAML parser, so nested mappings, sequences, multiline scalars, anchors and typed scalars are all handled.
Why convert between YAML and JSON?
YAML is common for config files (Kubernetes, CI, Compose) while JSON is common for APIs and code. Converting lets you move data between the two.
What happens if my YAML is invalid?
You get a clear error message describing the syntax problem instead of a broken result.
Is my data uploaded anywhere?
No. Both conversions happen locally in your browser.
For related tasks, explore JSON Formatter and CSV ⇄ JSON. Their guides explain the different inputs, assumptions and output formats.