YAML and JSON Converter
Use YAML and JSON Converter
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Free online YAML ↔ JSON converter. Paste YAML or JSON for instant bidirectional conversion with copy, download and clear. Ideal for config files, API docs, K8s and data exchange.
About this tool
Convert YAML and JSON both ways with validation, copy, download, and clearer error feedback for config and API work.
- 100% free with no usage limits
- No sign-up or login required
- Runs right in your browser
- Privacy-friendly and fast to use
Docs
Convert YAML and JSON both ways with validation, copy, download, and clearer error feedback for config and API work.
Key Features
- Bidirectional conversion: JSON → YAML and YAML → JSON in one click
- Syntax validation: invalid JSON or YAML shows specific error details
- Independent copy: separate copy buttons for JSON and YAML
- Independent download: save as
.jsonor.yamlfiles - Clear: reset both panes with one click
- Sample data: built-in config example to demonstrate usage
- Local processing: all conversion happens in your browser; no data leaves your computer
How to Use
- Choose direction: click ”→ Convert to YAML” for JSON→YAML, or ”← Convert to JSON” for YAML→JSON.
- Paste or type data in the corresponding text area.
- Click the convert button and the result appears in the opposite pane.
- Error messages appear below the text area if the input is invalid.
- Copy or download individual panes, or clear both.
Use Cases
- Config management: Docker Compose, Kubernetes, CI/CD config format conversion
- API docs: bidirectional conversion between JSON Schema and YAML
- Data exchange: convert between backend JSON APIs and frontend YAML configs
- Learning: compare JSON and YAML syntax differences
Technical Notes
- Uses the MIT-licensed js-yaml library, loaded from CDN
- All processing is client-side; no data is sent to any server
- Supports modern YAML features (anchors, aliases, multiline strings)
Last verified: 2026-07-13
FAQ
Is it free?
Yes, completely free. No signup, no limits.
Will my data be uploaded?
No. All conversion is local in your browser. No data ever leaves your computer.
What YAML features are supported?
Standard YAML 1.2: anchors (&), aliases (*), multiline strings (|/>), tags, booleans, etc.
What if conversion fails?
Error details appear below the text area. Fix and re-click convert.
What is the max file size?
No hard limit, but very large files (>10MB) may lag. Process in batches.
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