YAML to JSON Converter
Convert YAML to JSON in your browser. Catches syntax errors with parser messages.
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How to use
- 1 Paste valid YAML.
- 2 Toggle pretty print for indented JSON, off for compact.
- 3 Copy or download.
Why use this tool
- Powered by js-yaml — handles anchors, aliases, multi-document streams.
- Validation catches syntax errors with line numbers.
- Pretty mode for readability, compact mode for storage / transmission.
- Pure client-side.
Frequently asked questions
How are dates and booleans converted?
js-yaml uses YAML 1.2 — dates become ISO strings, true/false as booleans. "yes"/"no" stay strings (1.2 spec).
What about multi-document YAML (--- separators)?
Only the first document is converted. To handle multiple, split on `---` first.
Can it handle YAML anchors and aliases?
Yes — anchors (&) and aliases (*) are resolved on parse, producing duplicated data in JSON.
YAML to JSON Converter is a free developer utility by Zerethon Tools. Convert YAML to JSON in your browser. Catches syntax errors with parser messages. Runs entirely in the browser — no signup, no upload.
- Category
- Developer
- Pricing
- Free
- Privacy
- Browser-based
- Signup
- Not required
Privacy
Your data never leaves your browser unless explicitly stated. YAML to JSON Converter runs entirely client-side — no server upload, no logging, no tracking of your input.
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