Convert YAML to formatted JSON

Parse one YAML document and inspect the JSON shape before using it in APIs, scripts, fixtures, or config migration.

All data conversion happens locally in your browser. No JSON, CSV, YAML, or XML is sent to our servers.
YAMLJSON

Quick examples

Inspect YAML as formatted JSON

YAML to JSON helps when a config file, CI snippet, or infrastructure example needs to be checked in a stricter format. The converter parses one YAML document and writes indented JSON so object shape, arrays, and inferred values are easier to inspect.

Some YAML features are lost because JSON cannot represent them. Comments, anchors, aliases, and document separators should be reviewed before the converted JSON is used in scripts or tests.

YAML features to check after conversion

YAML feature JSON result
Comments Dropped, because JSON has no comment syntax.
Anchors and aliases Resolved data may remain, but anchor names are not preserved.
Implicit booleans, nulls, and numbers Parsed into JSON value types; quote values that must stay strings.
Multiple documents Split them first; this tool is intended for one YAML document.
String note: quote values such as 00123, 1.0, or 2026-05-01 when the exact text matters.

YAML to JSON FAQ

Why did a value become a boolean, number, or null?

YAML can infer types from plain text. Quote the source value if the JSON output should keep it as a string.

Are anchors and aliases safe to convert?

Review them carefully. JSON may contain the resolved data, but the reusable anchor structure and anchor names are not preserved.

Why should multi-document YAML be split first?

JSON needs one top-level value. Splitting YAML documents keeps each output clear and avoids merging unrelated configuration blocks.