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YAML to JSON

Conversion

Free online YAML to JSON converter. Paste YAML and get formatted JSON instantly with pretty-print, compact output, and custom indent. No signup, runs in your browser.

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How to use the YAML to JSON

To get started with YAML to JSON, paste your source content into the input area and select the format you want to convert to. The tool immediately processes the conversion client-side and displays the result. A convenient swap button lets you reverse the conversion direction if you need to go back the other way.

Why use the YAML to JSON

YAML to JSON eliminates the overhead of finding, evaluating, and learning one-off conversion tools for different format pairs. Instead of bookmarking YAML→JSON on one site, XML→JSON on another, and CSV→JSON on a third, you use one tool that handles multiple conversions with a consistent interface and the same privacy guarantees.

When to use YAML to JSON

Open YAML to JSON when you are migrating legacy data and need to verify that the conversion preserves all fields and values. Convert a small batch first, inspect the structure, then adjust settings before running the full migration. The instant feedback loop makes it faster than writing and debugging a conversion script for one-off jobs.

Key features of YAML to JSON

YAML to JSON converts data locally with no upload limits, supports multiple input and output formats, and preserves data fidelity — no silent truncation, no encoding errors. The instant feedback lets you iterate quickly without round-tripping through a server.

Common use cases for YAML to JSON

Common scenarios: migrating configuration from a legacy YAML-based deployment to a JSON-based infrastructure-as-code tool; converting a batch of CSV records into JSON for a frontend mock server; and translating XML responses from a SOAP API into JSON during a gradual REST migration project.

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Quick answers for YAML to JSON

What's the difference between YAML and JSON?
They describe the same shape of data - objects, arrays, strings, numbers, booleans, null. YAML is friendlier to read and supports comments; JSON is stricter and more universal as an interchange format. Most config files in modern tooling are YAML; most APIs speak JSON.
Can the YAML to JSON tool convert in both directions?
Yes. Switch between YAML → JSON and JSON → YAML, or use the Swap button to feed the output back as input. The same parser is used both ways so round-tripping is lossless for standard data.
How is YAML output formatted?
JSON is pretty-printed with 2-space indentation. YAML output uses 2-space indentation, no document markers, and 80-character line width - the defaults for js-yaml and the format most teams use for config files.
Does the converter support YAML anchors and references?
Yes. Anchors (&name) and aliases (*name) are resolved when converting to JSON. Going from JSON back to YAML produces a flat document - JSON has no anchor concept, so duplicated values are simply written out in full.
Is my YAML uploaded anywhere?
No. The YAML to JSON tool runs in your browser using js-yaml. Config files often contain secrets and infrastructure details; nothing is sent over the network.