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YAML to JSON Converter

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Code & Dev

YAML to JSON Converter

Convert YAML data to JSON format.

Workspace

Run the tool here

Browser utility

Output

Run the workspace to see the response here.

How to use

Paste the YAML document.
Run the conversion.
Check indentation-sensitive values before copying the JSON.

About this tool

Convert YAML into JSON, preserving nested maps, lists and scalar types.

YAML to JSON Converter is part of the TmpMailer Code & Dev set — free browser utilities that open instantly, need no account, and pair well with a temporary-email workflow when you just need a quick result.

Common use cases

Turning a CI config into a JSON fixture.
Inspecting a Kubernetes manifest as JSON.
Feeding YAML data to a JSON-only API.

Common questions

Are comments preserved?

No. JSON has no comment syntax, so comments are dropped.

How are dates handled?

They usually become strings unless the parser resolves them to a date type. Check the output.

Why did indentation break my file?

YAML relies on consistent spaces, not tabs. Mixed indentation changes the structure or fails to parse.

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