Free YAML Viewer Online

View YAML with syntax highlighting and toggle to JSON view — free, browser-only, no server.

YAML Input

View Output

What Is a YAML Viewer?

You've got a YAML config — a Kubernetes manifest, a Docker Compose file, a GitHub Actions workflow — and you just want to read it clearly without fighting indentation. This tool gives you syntax-highlighted YAML 1.2 rendering so keys, values, strings, and booleans are color-coded at a glance. Hit JSON View to see the same data as pretty-printed JSON — great for spotting type coercion or verifying the parsed structure before you deploy.

This tool runs entirely in your browser using JavaScript. No data is sent to any server, making it safe to use with secrets, production configs, or any sensitive YAML content.

YAML Viewer Examples

Paste YAML and view it with syntax highlighting, or switch to JSON View to inspect the parsed structure:

Example: Person record

YAML Input:

YAML Input

JSON View output:

JSON View

How to Use This Tool

1

Paste or Upload YAML

Paste your YAML into the left editor or click Upload to load a .yaml or .yml file. The Sample button loads example data.

2

Choose View Mode

Use the YAML View button to see the formatted YAML with syntax highlighting. Use JSON View to parse the YAML and display the data as pretty-printed JSON.

3

Copy or Download

Use Copy to put the output on your clipboard, or Download to save it as a file. To convert YAML more fully, see the YAML to JSON tool.

Frequently Asked Questions

Is my YAML data private when using this viewer?

Yes. All viewing and parsing happens entirely in your browser using JavaScript. No data is sent to any server — you can verify this in your browser's Network tab. Safe for Kubernetes manifests, API keys, tokens, and production configs.

What is the difference between YAML View and JSON View?

YAML View normalizes and displays your YAML with syntax highlighting — colors for keys, strings, numbers, and booleans. JSON View parses the YAML and renders the structured data as pretty-printed JSON, which is useful for inspecting parsed values and types. See the YAML 1.2 spec for more on how values are parsed.

Can I use the YAML Viewer to convert YAML to JSON?

The JSON View shows a JSON representation of your YAML. For a dedicated converter with download and copy features, use the YAML to JSON tool.

What YAML features are supported?

Basic key-value pairs, nested objects, lists, and scalar types (strings, numbers, booleans, null) are supported in both views. Complex YAML anchors and aliases may not be fully parsed in JSON View. For full YAML support, see yaml.org.

How is the YAML Viewer different from the YAML Parser?

The YAML Viewer focuses on displaying YAML with syntax highlighting and letting you toggle to a JSON view. The YAML Parser focuses on inspecting the parsed data structure and types. Both run entirely in the browser.

Related Tools

YAML Formatter YAML Validator YAML Parser YAML to JSON JSON Formatter

For more on YAML, see the YAML 1.2 specification and yaml.org.