JSON Formatter
Format, beautify and validate JSON instantly in your browser. Free online JSON formatter with 2/4-space and tab indentation, no signup, 100% client-side.
JSON to YAML Converter
Paste JSON below and get equivalent YAML with block-style indentation, handy for Kubernetes manifests, Docker Compose, GitHub Actions and other config files. Values that could be misread as YAML are quoted automatically.
Private by default: processing stays on your device
Example: JSON → YAML
Input
{"name":"Ada","tags":["dev","admin"]} Output
name: Ada tags: - dev - admin
These buttons share the page link, not your input.
Want to include your text?
Your current input will be stored in the link after the # symbol, not uploaded to HandyBrowserTools. Anyone with this link can read that text. If you send or post it, the service you choose also receives the link. Do not include passwords or private information.
Frequently asked questions
What JSON does it accept?
Any valid JSON value, including objects, arrays, strings, numbers, booleans and null, nested to any depth. Invalid JSON is reported inline so you can fix it before converting.
Why are some strings wrapped in quotes?
Strings that YAML would otherwise read as a number, boolean, null or a special character (like "true", "123" or "a: b") are double-quoted so the YAML round-trips back to the same value.
Does it convert YAML back to JSON?
This tool goes JSON → YAML. For the reverse, format your JSON with the JSON Formatter; YAML parsing may be added as a separate tool.
Is my data private?
Completely. Conversion happens entirely in your browser, and nothing is ever uploaded to a server.
Related tools
JSON to CSV Converter
Convert a JSON array to CSV online in one click. Handles nested values, quotes and custom delimiters, free and 100% client-side.
XML Formatter
Format and validate XML online with proper indentation. Free XML beautifier and minifier that runs 100% in your browser, with no upload needed.
JSON Minifier
Minify JSON online by removing all whitespace and line breaks. Free, instant, and 100% client-side; see the size saving immediately.