JSON to YAML Converter

This converter rewrites JSON as YAML, the indentation-based format used by Kubernetes, Docker Compose, GitHub Actions and Ansible. {"name":"app","ports":[80,443]} becomes name: app, followed by ports: with each number on its own - line.

Every JSON document is already valid YAML, but hand-written YAML is easier to read because it drops the braces, brackets and most quotes. The converter parses your JSON and writes YAML with 2-space indentation. Arrays become - lists, nested objects become indented blocks, and empty arrays and objects are written as [] and {}. Long lines are never wrapped, and keys keep their original order. Strings are quoted only when they have to be. A string that would change type if left bare, such as "yes", "true", "123" or "2024-01-15", is wrapped in single quotes so any YAML parser still reads it as text. The same goes for a string that contains a colon followed by a space. Multi-line strings become a | block. The table shows these cases.

The panels work in both directions, so you can edit the YAML side and watch the JSON update. If your JSON is invalid, the parser's error appears and the YAML panel keeps its last good result. To tidy YAML you already have, use the YAML Formatter, and for Rust or Python config files, the JSON to TOML Converter.