< Codevup />

JSON to YAML Converter

JSONYAML
JSON
YAML
What is a JSON to YAML converter?
A JSON to YAML converter transforms data from JSON (JavaScript Object Notation) format into YAML (YAML Ain't Markup Language) format, and vice versa. Both formats represent the same structured data but with different syntax. JSON uses braces and brackets, while YAML uses indentation and is often considered more human-readable. This tool handles bidirectional conversion instantly in your browser.
How do I convert JSON to YAML?
Paste your JSON into the left panel. The YAML equivalent appears instantly in the right panel. The direction indicator at the top shows JSON on the left and YAML on the right. Click the arrow button between them to swap directions and convert YAML back to JSON.
How do I convert YAML to JSON?
Click the swap button (the two arrows icon) in the toolbar to switch to YAML to JSON mode. The left panel will then accept YAML input and produce JSON output on the right. You can also paste YAML directly and use the swap button to flip any existing content between the panels.
What is the difference between JSON and YAML?
JSON and YAML both represent structured data, but with different trade-offs. JSON is strict, widely supported, and ideal for machine-to-machine communication (APIs, config files in JavaScript projects). YAML is a superset of JSON, uses indentation instead of brackets, supports comments, and is often preferred for configuration files like Docker Compose, Kubernetes manifests, and CI/CD pipelines. YAML is easier for humans to read and write; JSON is easier for machines to parse.
When should I use JSON vs YAML?
Use JSON when working with REST APIs, browser storage, or any context where JavaScript is parsing the data natively. Use YAML for configuration files where human readability matters, such as Docker Compose files, Kubernetes manifests, GitHub Actions workflows, Ansible playbooks, and Helm charts. Converting between the two is common when migrating config formats or adapting data for different tools.
How do I know if my JSON or YAML is valid?
If the input is valid, a green "Converted" badge appears in the output panel and the converted result is displayed immediately. If there is a syntax error, a red error message appears below the panels with the exact parse error, pointing you to the problematic part of the input.
Is my data safe when using this converter?
Yes. All conversion happens entirely in your browser using JavaScript. Your JSON or YAML data is never sent to or stored on any server. This makes the tool safe to use with sensitive configuration files, API responses, or any private data.
Are all YAML types supported when converting to JSON?
This converter supports all standard YAML types that have a JSON equivalent: strings, numbers, booleans, null values, arrays, and objects. YAML-specific features that have no JSON counterpart, such as comments, multi-document streams, and anchors, are handled by resolving them to their final values before producing the JSON output.
What is JSON?

JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format derived from JavaScript object literal syntax and standardized in RFC 8259. It is language-independent, with parsers available in virtually every programming language.

A JSON document is built from six value types: strings (double-quoted), numbers, booleans (true / false), null, arrays wrapped in [], and objects (key-value maps) wrapped in {}. Every key must be a double-quoted string, and trailing commas are not allowed.

JSON is the dominant format for REST APIs, browser storage, and configuration files in JavaScript projects (package.json, tsconfig.json). Its strict syntax and native browser support make it the default choice for machine-to-machine data exchange on the web.

What is YAML?

YAML (YAML Ain't Markup Language) is a human-friendly data serialization format designed to be easy to read and write by hand. First released in 2001, YAML is a superset of JSON, meaning any valid JSON document is also valid YAML.

Instead of braces and brackets, YAML uses indentation to represent structure. It supports features that JSON lacks: inline comments (lines starting with #), multi-line strings, anchors and aliases for reusing values, and multiple documents in a single file separated by ---. These features make YAML significantly more expressive for configuration use cases.

YAML is the standard format for DevOps and infrastructure tooling: Docker Compose files, Kubernetes manifests, GitHub Actions workflows, Ansible playbooks, Helm charts, and OpenAPI specifications all use YAML. Its readability comes at the cost of indentation-sensitive parsing, which can be a source of hard-to-spot bugs when whitespace is incorrect.