YAML Multi Document Splitter

How to use this developer tool

1. Paste or upload the yaml stream you want to inspect.
2. Run Split YAML Stream, or press Ctrl/Cmd + Enter.
3. Read the summary, diagnostics, and reported counts before using the output.
4. Copy the result or download it in the shown format.

What this developer tool does

The stream is divided at document boundary markers that appear on their own line. Output sections include document number and source range, followed by the original document text.

The output is a readable combined report. Use the JSON download for structured document metadata or copy individual sections into separate files.

Example

The Sample button loads a representative yaml stream. Running it produces the same kind of numbered documents shown in the result panel, including counts that are calculated from the supplied text rather than fixed examples.

---
name: api
port: 8080
---
name: worker
queues:
  - default
...
---
name: scheduler

Use cases

• Review configuration changes before committing them.
• Diagnose format-specific problems in CI or deployment inputs.
• Create a copy-ready result for documentation or another developer tool.
• Check generated files without exposing project data to a remote service.

Tips for reliable output

• Start with the smallest input that reproduces a problem.
• Keep a copy of the original before replacing configuration files.
• Read warnings and limitations, even when the main result succeeds.
• Validate the output again with the parser used by your application.
• Use UTF-8 when saving downloaded text.

Processing details

Splitting operates on raw lines and does not interpret anchors, tags, scalars, or indentation. Content characters and internal line breaks are preserved.

The tool does not validate whether each resulting document is valid YAML. Boundary-like text inside a block scalar may require manual review because this lightweight splitter does not parse scalar context.