YAML / JSON / TOML Converter
Convert between YAML, JSON, and TOML instantly. Perfect for Kubernetes configs, Docker Compose, GitHub Actions, and Cargo.toml. 100% browser-based.
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To
YAML
JSON
Converted output will appear here...Tip: Press Ctrl+Enter to convert. Note: TOML does not support null values.
About YAML / JSON / TOML Converter
YAML, JSON, and TOML are the three most common configuration formats in modern software. This tool converts between all three instantly in your browser — no installs, no uploads, no server. YAML is popular in Kubernetes and GitHub Actions, JSON in APIs and Node.js, and TOML in Rust projects and Hugo.
How It Works
- Select your input format (YAML, JSON, or TOML)
- Paste your configuration or data into the input panel
- Select your desired output format
- Click Convert or press Ctrl+Enter
- Copy the result or download as a file
Key Features
- Convert YAML to JSON, JSON to YAML, TOML to JSON, and more
- Swap input and output formats with one click
- Handles Kubernetes configs, Docker Compose, and GitHub Actions files
- Download result as .yaml, .json, or .toml file
- Preserves nested objects, arrays, and all data types
- 100% browser-based — your configs never leave your device
Frequently Asked Questions
- What is the difference between YAML and JSON?
- YAML is a superset of JSON designed for human readability — it uses indentation instead of braces and brackets, supports comments, and is more concise for complex nested data. JSON is stricter, has no comments, and is the standard for APIs and data interchange. YAML is preferred for config files (Kubernetes, Docker, GitHub Actions); JSON is preferred for REST APIs and storage.
- How do I convert YAML to JSON?
- Select YAML as the input format, paste your YAML content into the left panel, select JSON as the output format, then click Convert. The tool parses your YAML and produces equivalent JSON with proper indentation. Arrays, nested objects, strings, numbers, and booleans all map correctly.
- What is TOML and what is it used for?
- TOML (Tom's Obvious Minimal Language) is a config format designed to be easy to read and write, with a clear key-value syntax. It is the standard config format for Rust projects (Cargo.toml), Hugo static site generator, and many modern CLI tools. TOML is stricter than YAML — it doesn't support null values and requires consistent array types.
- Can I convert JSON to YAML online?
- Yes — select JSON as the input format, paste your JSON, select YAML as the output format, and click Convert. The result is clean, properly indented YAML that you can copy or download. This is useful for turning API responses or config snippets into Kubernetes or Docker Compose format.