YAML to JSON Converter Online
Convert YAML to JSON format instantly. Perfect for transforming configuration files into structured JSON data.
Input
Output
About YAML to JSON Converter
YAML is the go-to format for configuration files across DevOps, cloud infrastructure, and modern development. Our YAML to JSON converter parses your YAML data and transforms it into clean, valid JSON — perfect for feeding configs into APIs, processing in code, or converting between tooling ecosystems. Whether you are working with Kubernetes manifests, Docker Compose files, GitHub Actions workflows, or Ansible playbooks, this tool handles the conversion instantly and entirely in your browser.
How to Use YAML to JSON Converter
Paste or Upload Your YAML
Paste YAML content directly into the left editor panel, or drag and drop a .yaml or .yml file from your computer. The editor accepts any valid YAML 1.2 content including Kubernetes manifests, Docker Compose files, CI/CD configs, and general data files.
Review the JSON Output
The converter instantly parses your YAML and displays the equivalent JSON in the right panel. YAML mappings become JSON objects, sequences become arrays, and all scalar types (strings, numbers, booleans, null) are mapped to their JSON equivalents. Anchors and aliases are fully resolved.
Copy or Download the Result
Click the copy button to grab the JSON output to your clipboard, or download it as a .json file. The output is pretty-printed with 2-space indentation. Use it in API calls, feed it into jq, or pass it to other AllJSONTools converters for further processing.
Common Use Cases
Parse Kubernetes Manifests
Convert Kubernetes YAML manifests (Deployments, Services, ConfigMaps, Ingresses) to JSON for use with the Kubernetes API, kubectl with --output=json, or processing in CI/CD automation scripts.
Docker Compose Conversion
Transform docker-compose.yml files to JSON for programmatic manipulation, schema validation, diffing across environments, or integration with container orchestration tools that prefer JSON input.
CI/CD Pipeline Processing
Convert GitHub Actions, GitLab CI, CircleCI, or Azure Pipelines YAML configs to JSON for automated analysis, validation against schemas, or building CI/CD management dashboards.
API Payload Preparation
Transform YAML data files into JSON payloads for REST API calls, database seeding, or application configuration endpoints that require JSON input format.
Ansible Playbook Analysis
Convert Ansible playbooks and inventory files from YAML to JSON for analysis, diffing, or feeding into custom tooling that processes JSON natively.
Helm Chart Values Processing
Convert Helm values.yaml files to JSON for merging with other config sources, validating against schemas, or programmatic manipulation before deployment.
Why Use Our YAML to JSON Converter?
DevOps-Ready
Convert Kubernetes, Docker Compose, Helm, Ansible, and CI/CD YAML configs to JSON for programmatic use in scripts and APIs
Lossless Conversion
All YAML data types, nested structures, sequences, and scalar values are accurately preserved in the JSON output
Anchor Resolution
YAML anchors (&) and aliases (*) are fully expanded during conversion, producing standalone JSON with no references
Instant and Private
Runs entirely in your browser with zero server round-trips. Your configuration files never leave your device
Error Detection
Syntax errors in your YAML are caught immediately with helpful messages pointing to the problem location
Full YAML 1.2 Support
Handles all YAML 1.2 features including block scalars, flow collections, multiline strings, and special types
Key Features
Full YAML 1.2 specification support including all node types
Anchor (&) and alias (*) resolution with complete expansion
Preserves all data types — strings, numbers, integers, booleans, null, and nested structures
Block and flow scalar handling including multiline strings
Nested objects and arrays with unlimited depth
Real-time syntax error detection with line number references
File upload with drag and drop for .yaml and .yml files
Pretty-printed JSON output with 2-space indentation
Copy to clipboard and download as .json file
Monaco editor with YAML syntax highlighting and line numbers
100% Client-Side Processing
Your data never leaves your browser
All processing happens in your browser using JavaScript. Your data is never sent to our servers or any third party. Safe for sensitive data, API keys, and production configs.
Frequently Asked Questions
Quick answers to common questions about yaml to json converter
Our converter handles standard single-document YAML. For multi-document YAML files separated by --- delimiters, paste each document individually for the cleanest results. Each document converts independently to a complete JSON object.
Yes. YAML anchors (&name) and aliases (*name) are fully resolved during conversion. The resulting JSON contains the completely expanded data with no references — every alias is replaced with the actual anchored value.
YAML comments (lines starting with #) are discarded during conversion because JSON does not support comments. All actual data values, keys, and structures are preserved exactly. If you need to preserve comments, consider keeping a copy of the original YAML file.
YAML dates (2024-01-15), timestamps (2024-01-15T10:30:00Z), and other special types are converted to their JSON equivalents — typically strings. ISO 8601 dates and timestamps remain as string values in the JSON output, preserving the original formatting.
YAML uses indentation to define structure — nested indentation becomes nested objects or arrays in JSON. The converter respects your YAML indentation exactly, producing correctly nested JSON. Inconsistent indentation in the YAML will be flagged as a syntax error.
Yes. YAML 1.2 recognizes true/false as boolean values. Legacy YAML 1.1 values like yes/no, on/off, and y/n are handled as well and converted to JSON true/false booleans. If you want these treated as strings, wrap them in quotes in the YAML source.
The converter works comfortably with YAML files up to 10 MB, which covers the vast majority of configuration files, data exports, and manifests. Processing happens entirely in your browser, so speed depends on your device but is typically instant for files under 1 MB.
YAML multiline strings (using | for literal blocks or > for folded blocks) are converted to single JSON strings. Literal blocks preserve newlines as \n characters in the JSON string, while folded blocks join lines with spaces. The block chomping indicator (+, -) controls trailing newlines.
The data content is fully preserved — all keys, values, types, and nesting. However, YAML-specific features like comments, anchors/aliases (expanded inline), tag directives, and formatting choices (indentation style, quote style) are not represented in JSON, since JSON has no equivalent features.
Learn More
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< / >
Working with API JSON Responses
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=> { }
How to Parse JSON in JavaScript
Process the converted JSON output in your JavaScript applications
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