// free-toolYAML → JSON
YAML to JSON
Paste YAML — anchors, aliases and nested structures included — and get pretty-printed JSON, or a precise error message with the line that broke parsing. Doubling as a quick YAML validator, everything runs locally with js-yaml.
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Frequently asked questions
Can I use this as a YAML validator?
Yes — invalid YAML shows the parser's error with line/column, which is exactly what you need to fix a broken config.
Is my config uploaded?
No — parsing happens in-browser. Secrets in your YAML never leave your machine.
More data tools
CSV to JSON
Parse CSV (with headers) into clean JSON arrays.
JSON to CSV
Flatten a JSON array of objects into spreadsheet-ready CSV.
JSON to YAML
Convert JSON into clean, readable YAML for configs.
JSON to XML
Serialize JSON objects into well-formed, indented XML.
XML to JSON
Parse XML into JSON, preserving attributes and structure.
JSON Formatter
Format, minify and validate JSON with precise error locations.
Need custom tools like this in your product?
I build fast, privacy-first web applications with Next.js — these converters run entirely in the browser, and yours can too.