Parse a bounded YAML document and serialize it with a chosen indentation so mappings and sequences are easier to review.
Inputs are limited to 1 MiB and stay in this browser tab.
Nothing is placed in a URL, account, preset, or remote log.
Strict, bounded, local processing
Formatting is a parse-and-serialize operation, not an indentation repair guess. Invalid or ambiguous source remains available for deliberate correction.
Replacing spaces line by line cannot reliably distinguish indentation from whitespace inside block scalars or quoted text. The formatter parses the YAML data model first and writes one consistent representation only after the document is valid.
The selected indentation changes visual nesting. It does not sort mapping keys, reorder sequences, merge documents, or apply an application schema.
A serializer may choose a normalized scalar style while preserving the represented value. Compare the result before replacing a hand-authored file when comments, anchors, or presentation choices are part of a review workflow.
