Will formatting YAML change the data?

Formatting changes the presentation of the YAML, not the underlying parsed structure. The goal is to preserve the same data while rewriting the document with cleaner indentation and optionally sorted keys.

Why would I sort keys in YAML?

Sorting keys can make large config files easier to scan and can reduce noisy diffs in version control. It is especially useful when files are generated or edited by multiple people over time.

Can this YAML formatter handle frontmatter?

Yes. Frontmatter-style YAML is still YAML, so the formatter works well for metadata blocks used in Markdown-based sites and documentation systems.

Does formatting happen online or locally?

Formatting happens locally in your browser. Your YAML content is not sent to a server, which is useful for private or internal config files.

What if the YAML is invalid?

The formatter must parse the document before it can rewrite it. If the YAML is invalid, the tool shows the parsing error instead of generating formatted output.

YAML Formatter

Format and beautify YAML documents with consistent indentation and optional key sorting. Perfect for infrastructure configs, GitHub Actions files, Docker Compose snippets, and readable diffs in version control.

yaml

formatter

beautify

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Quick Presets

Examples for yaml input workflows

YAML Input & Settings

Paste YAML and normalize indentation for cleaner reviews, commits, and shared config files.

Characters: 0

Lines: 0

Bytes: 0

YAML Indent

2 spacesCommon choice for config files and frontmatter4 spacesWider indentation for nested structures

Key Order

Keep original orderPreserve the parser order from the source documentSort keysNormalize object keys for more stable diffs

How it works: Formatting parses the YAML first, then rewrites it with consistent indentation. You can also sort object keys to normalize config files for reviews and diffs.

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