Paste YAML and this tool parses it with a self-contained parser that understands nested mappings, block lists, plain and quoted scalars, and booleans, numbers and null. If the structure is inconsistent — a bad indent or a stray colon — it reports the line so you can fix it fast.
Valid input is re-serialized with clean two-space indentation so messy or mixed-indent files become tidy and diff-friendly, and you can also convert straight to pretty-printed JSON. Everything runs locally in your browser — your configuration and secrets are never uploaded to any server.