YAML to JSON Converter
Convert YAML to JSON and JSON to YAML instantly: indentation-safe, anchors expanded, pretty-printed output. Runs in your browser, no upload.
Kubernetes manifests, GitHub Actions, docker-compose, CI pipelines — configuration lives in YAML, while APIs and logs speak JSON. This converter translates between them in both directions, preserving types (numbers stay numbers, booleans stay booleans) and expanding anchors and aliases.
Paste, convert, copy. Everything parses locally, so private config files with internal hostnames and secrets-in-progress never leave your machine.
100% in-browser · no upload · no signup · nothing you paste or drop here leaves your device
JSON ↔ YAML Converter
Convert between JSON and YAML formats. Bidirectional, adjustable indent. 100% local.
This tool runs 100% in your browser. All computation happens locally on your device — your input is never uploaded to any server. Results are for reference only.
JSON braces vs YAML indentation — two ways to write the same tree — illustrated
Both formats encode the same data structure — objects, keys, values, arrays. JSON wraps every object in { } and separates members with commas, so braces carry the structure. YAML drops the braces and lets indentation carry the structure: a child key that is indented one more level belongs to the parent above it. Arrays are introduced with - . Converting is lossless for well-formed data — every level of nesting in one maps to exactly one level of indent in the other.
The same server config is written once in each syntax. Notice how each { } block on the left becomes one indented block on the right — the nesting level is the signal in YAML.
Moving a Node deployment config from JSON to YAML for readability.
- Flatten the root:Top-level keys in JSON become top-level keys with no leading space
- Nest by one level:An object like "server: { host: … }" becomes "server:" with its children indented once
- Arrays as lines:"features": […]" becomes a dash-prefixed line per element
- Read it back:Loading the YAML returns the exact same object — round-trip is lossless
About this YAML to JSON converter
This page covers convert yaml to json online, json to yaml converter free, yaml parser online, kubernetes yaml to json — all the same underlying task as YAML to JSON converter. The tool above is FreeToolHub's json yaml embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Frequently asked questions
How do I convert YAML to JSON?
Paste the YAML into the input panel and the JSON output appears immediately — pretty-printed and ready to copy. Conversion is bidirectional: paste JSON instead and you get clean, properly indented YAML. Invalid input is flagged with the parse error location.
Are YAML anchors supported?
Yes. Anchors and aliases are expanded to full values in the JSON output, since JSON has no equivalent construct. Multi-document YAML files (---) are converted per document, and the YAML side of the converter can re-introduce anchors when converting JSON back.