Formatting & Validation

YAML Formatter, Validator and Converter

Validate YAML and convert between YAML and JSON.

Processed locally in your browser

InputFile

YAML or JSON input

0 B

Input size: 0 B. Detected as YAML. Drop a YAML or JSON file here.

Converted output · 0 B

Format or convert valid YAML or JSON to see the result.

YAML or JSON input

0 B

Input size: 0 B. Detected as YAML. Drop a YAML or JSON file here.

How to use this tool

Paste content or open a local YAML, YML, or JSON file.
Select Auto detection or force the expected input format.
Format in place, convert formats, or recursively sort keys.
Review syntax errors, statistics, and the optional tree view.
Copy the result or download it with the required extension.

Examples

Multi-document YAML

Separate configuration documents with --- and inspect them together.

JSON conversion

Paste JSON, select JSON input, then convert it to readable YAML.

Frequently asked questions

Is my configuration uploaded?

No. Parsing, formatting, file reading, conversion, and downloads happen in this browser tab.

How are aliases and custom tags handled?

Aliases have a strict expansion limit. Custom or execution-capable tags are rejected rather than instantiated.

About this tool

Validate and format YAML, convert YAML to JSON or JSON to YAML, inspect multiple documents, and review structure without sending configuration data to a server.

Formatting & Validation

YAML Formatter, Validator and Converter

Validate YAML and convert between YAML and JSON.

Processed locally in your browser

InputFile

YAML or JSON input

0 B

Input size: 0 B. Detected as YAML. Drop a YAML or JSON file here.

Converted output · 0 B

Format or convert valid YAML or JSON to see the result.

YAML or JSON input

0 B

Input size: 0 B. Detected as YAML. Drop a YAML or JSON file here.

How to use this tool

Paste content or open a local YAML, YML, or JSON file.
Select Auto detection or force the expected input format.
Format in place, convert formats, or recursively sort keys.
Review syntax errors, statistics, and the optional tree view.
Copy the result or download it with the required extension.

Examples

Multi-document YAML

Separate configuration documents with --- and inspect them together.

JSON conversion

Paste JSON, select JSON input, then convert it to readable YAML.

Frequently asked questions

Is my configuration uploaded?

No. Parsing, formatting, file reading, conversion, and downloads happen in this browser tab.

How are aliases and custom tags handled?

Aliases have a strict expansion limit. Custom or execution-capable tags are rejected rather than instantiated.

About this tool

Validate and format YAML, convert YAML to JSON or JSON to YAML, inspect multiple documents, and review structure without sending configuration data to a server.