YAML Beautifier Online: Format and Pretty-Print YAML
The YAML Beautifier uses Prettier to format pasted YAML into more consistent, readable output. It preserves comments and multi-document files, while letting you configure indentation, print width, and quote style. Paste or drop in a YAML document, choose the formatting options you need, then copy the result. Use it to reduce whitespace noise and make YAML easier to review.
The YAML Beautifier is an online YAML formatter that uses Prettier to turn pasted YAML into more readable, consistently formatted output. Use it to beautify a full document or a smaller snippet before reviewing, sharing, or committing it. You can paste or drop in your YAML and copy the formatted result when it is ready.
The formatter preserves comments and multi-document files. You can configure indentation, print width, and quote style to control the appearance of the output. These options let you adjust how YAML is laid out without changing the purpose of the tool: making the text easier to read and review. If the input does not parse, the tool can help identify the line where the issue occurs.
YAML is a human-readable format for representing structured data, and its indentation helps express relationships between values. Formatting can make that structure easier to scan, while consistent whitespace can reduce noise in code review diffs. A YAML beautifier is useful when generated or unfamiliar files need to be easier to inspect, or when a snippet needs to be presented clearly to others.
The YAML Beautifier runs entirely in your browser. Your input is processed on your device; no data is sent to a server. It is free, and once the page has loaded it works offline without a server dependency. Developers and DevOps engineers can use it to prepare configuration files and snippets for review, collaboration, or commits.
Step 1: Paste or drop your YAML into the input area. You can format a complete document or a snippet you want to review.
Step 2: Choose the indentation, print width, and quote style options. These settings control how Prettier lays out the formatted YAML.
Step 3: Run the formatter to create a more consistent, readable version of your input. Comments and multi-document files are preserved.
Step 4: Review the result, then copy the formatted YAML. Consistent whitespace can make changes easier to spot in a diff.
Use case: Make an unreadable, machine-generated YAML file easier to review before you commit it. Consistent formatting helps you focus on the content.
Use case: Format a YAML document before comparing it with the conventions or specification your project follows. A clearer layout makes it easier to inspect.
Use case: Produce consistently indented YAML so a diff shows meaningful changes instead of whitespace noise.
Use case: Format a snippet before adding it to a bug report or code review. Readable YAML is easier for teammates to discuss.
Use case: Check whether a YAML input can be formatted, and use the reported line information to locate an issue when it cannot be parsed.
Use case: Beautify a YAML file that contains comments without losing those comments in the formatted output.
Use case: Format a multi-document YAML file while keeping its documents together in the output.