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Input
JSON
Limit
1 MiB
Runtime
Browser

Convert strict JSON into readable YAML

Parse strict JSON and write a readable YAML representation with explicit indentation and no cloud conversion step.

Local processingNo sign-upNo content logging

Convert JSON to YAML

Inputs are limited to 1 MiB and stay in this browser tab.

Paste or edit the source. Tool Swim does not upload or save it.

YAML document

Nothing is placed in a URL, account, preset, or remote log.

What this tool does

Strict, bounded, local processing

The input remains subject to JSON grammar: comments, trailing commas, undefined, and non-finite numbers are rejected before YAML serialization.

Strict JSON creates a predictable source model

JSON already limits data to objects, arrays, strings, finite numbers, booleans, and null. Those values can be written into a conservative YAML representation without evaluating code or inferring a custom application type.

Object member and array order remain stable. The indentation setting changes presentation only and does not sort keys or flatten nested values.

Readable YAML still needs consumer validation

Conversion cannot add domain knowledge that the JSON did not contain. Validate the result against the destination's schema and keep representative round-trip fixtures when exact scalar interpretation matters.

Primary references

Questions and answers

Related YAML tools

YAML to JSON ConverterTranslate YAML mappings, sequences, and JSON-compatible scalars into strict JSON without uploading the source document.YAML FormatterParse a bounded YAML document and serialize it with a chosen indentation so mappings and sequences are easier to review.YAML Schema ValidatorCheck parsed YAML values against a separately supplied JSON Schema and return structured instance paths for each supported violation.