JSON YAML Converter
JSON and YAML format conversion, supports syntax highlighting and history tracking
Loading...
Features Overview
Professional JSON ↔ YAML converter with batch processing, Schema validation, 10+ config templates and history management, perfectly tailored for Kubernetes, Docker Compose, GitHub Actions and other config file scenarios.
Tool Description
Free online JSON YAML conversion tool. Supports bidirectional conversion between JSON and YAML, real-time syntax validation, code highlighting, suitable for configuration files, Kubernetes, Docker Compose and other scenarios.
Capabilities Checklist
- JSON ↔ YAML Bidirectional: Real-time conversion with syntax highlighting, one-click swap, supports YAML 1.2 standard.
- Batch Processing Mode: Upload multiple files at once, auto-detect types and convert, single file direct download or batch ZIP packaging.
- Smart File Upload: Support click/drag-and-drop for .json/.yaml/.yml files (max 5MB), automatically match conversion direction.
- Real-time Syntax Validation: Precisely locate JSON/YAML format errors with line numbers and detailed error messages.
- Professional Code Highlighting: Powered by Highlight.js syntax engine, supports light/dark themes for enhanced code readability.
- Advanced YAML Config: 3 styles (default/compact/flow), 3 quote types, 2 array formats, key sorting support.
- Schema Validator: Integrated JSON Schema validation, built-in package.json, tsconfig.json templates, custom rule validation.
- Rich Template Library: 10+ preset templates covering Kubernetes Deployment, Docker Compose, GitHub Actions, AWS CloudFormation and more.
- Conversion History: Auto-save last 20 conversion records, one-click restore, copy and clear for improved productivity.
- Responsive Design: Adaptive desktop/mobile layout, smart config arrangement, touch-friendly interaction experience.
Feedback
Help us improve the tool
Related Tools
JSON to PHP Array Converter
Convert JSON to PHP array online with [] or array() output and nested data support
JSON to Python Dictionary Converter
Free online JSON to Python dictionary tool - instant conversion, supports bidirectional conversion
JSON to Java Class Generator
Free online JSON to Java class tool - supports Jackson, Gson annotations and Lombok
JSON to C++ Converter
Free online JSON to C++ converter - Support nlohmann/json, RapidJSON, Boost.JSON
Related Guides
Frequently Asked Questions
What are JSON and YAML?
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy to read and write, commonly used for API responses and configuration files. YAML (YAML Ain't Markup Language) is a human-readable data serialization format with simpler syntax and comment support, often used for config files like Kubernetes and Docker Compose.
How do I use batch conversion?
Click 'Work Mode' to switch to 'Batch Mode', then drag and drop or click to upload multiple .json/.yaml files. The system will automatically identify file types and convert them. After conversion, you can download files individually or package them as a ZIP. Supports files up to 5MB, ideal for config file migration scenarios.
How do I use the template library?
In single file mode, click the 'Templates' button to browse 10+ preset templates including Kubernetes Deployment, Docker Compose, GitHub Actions, AWS CloudFormation, etc. Click a template to auto-fill the input box. Supports search and category filtering. Templates automatically match the corresponding conversion mode.
What is Schema validation?
Schema validation checks if JSON/YAML data conforms to predefined structure specifications. Click the 'Schema Validation' button, paste or select common schemas (like package.json, tsconfig.json). The system will check data types, required fields, formats, etc., and provide detailed error messages.
What do advanced YAML options do?
Advanced options provide fine-grained control over YAML output: 1) Style: default (readable), compact (shorter line width), flow (single-line format); 2) Quoting: no quotes, single quotes, double quotes; 3) Array format: block (multi-line) or flow (single-line); 4) Sort keys: alphabetical order for object keys. These options help generate YAML that conforms to specific standards.
Is my data safe after conversion?
Absolutely safe! All conversion operations are performed locally in your browser, no data is uploaded to servers. We use pure frontend technology to ensure your data privacy. Converted data is optionally saved in browser's local history, never accessed by third parties.
Which YAML formats are supported?
We support standard YAML 1.2 format, including: 1) Basic data types (strings, numbers, booleans), 2) Arrays and objects, 3) Multi-line text, 4) References and anchors. Offers three YAML style options: default (better readability), compact (line width constraints), and flow (JSON-like single-line format).
Which files are supported for batch conversion?
Batch conversion supports .json, .yaml, .yml file extensions with a maximum size of 5MB per file. The system automatically identifies file types: .json files convert to YAML, .yaml/.yml files convert to JSON. After conversion, single files can be downloaded directly, multiple files are automatically packaged as ZIP format.
What are YAML's indentation rules?
YAML uses space indentation to represent hierarchy, key rules: 1) Only spaces allowed, no Tab key; 2) Elements at same level must be left-aligned; 3) Child elements must be indented more than parent; 4) Recommended to use 2 or 4 spaces as indent unit. Our converter offers both 2-space and 4-space indent options.
How to handle conversion errors?
The converter auto-detects and displays error messages: 1) JSON format errors: Check for missing quotes, commas or brackets; 2) YAML format errors: Check correct indentation and avoid Tab key; 3) Special characters: Ensure proper escaping; 4) Data structure: Verify structure conforms to spec. Error hints pinpoint exact issues to help you locate and fix quickly.