YAML Viewer
WebRender YAML with a collapsible structure and syntax highlighting. Navigate large config files, search inside the tree, fold branches and copy any node path.
Related Tools
About YAML Viewer
YAML expresses hierarchy purely through indentation, so the longer a file gets, the harder it becomes to tell which level a given key sits at — the classic source of subtle config bugs. This tool parses YAML and renders it as a collapsible tree locally in your browser, making nesting, sequences, mappings, and anchor references immediately visible, with syntax highlighting across keys, strings, numbers, booleans, and comments. Because indentation is so load-bearing in YAML (siblings must align and tabs are forbidden), a tree view is ideal for diagnosing exactly how many levels deep a key really is. Full-text search works even inside collapsed nodes and auto-expands the path to each match, so you can jump straight to a key in a big Kubernetes manifest, CI workflow, or docker-compose file. Everything is read-only and processed locally, so nothing about your config is uploaded.
How to Use
- Open the YAML Viewer tool
- Enter or paste the content to process
- Adjust the output options as needed
- Click the Run button; results appear in real time
- Copy or export the result
Use Cases
- Review K8s manifests — Render verbose Deployment/Service YAML as a tree to verify each level of config fast.
- Understand CI config — Expand GitHub Actions / GitLab CI YAML to see the job and step hierarchy clearly.
- Debug indentation — When YAML misbehaves, use the tree view to confirm which level a key is indented under.
- Inspect anchors — See the actual expanded structure of YAML anchors and references.
- Browse large configs — Collapse irrelevant sections to focus on the target config block.
- Audit Helm values — Render a Helm values.yaml as a tree to quickly confirm every nested override is at the correct depth.
- Trace Docker Compose — View the full docker-compose service hierarchy collapsed to trace depends_on chains and volume mounts.
FAQ
Does it support multi-document YAML?
Yes. Multiple documents separated by --- are parsed individually and shown as separate blocks in the tree.
How are anchors and references shown?
The tool expands anchor references so you see the full effective content at the reference site.
Does it modify my YAML?
No. It only parses and renders read-only, leaving the original content unchanged.
Why does parsing fail?
Usually inconsistent indentation or mixed tabs. YAML is very indentation-sensitive; the error helps you locate it.
Can I search within collapsed nodes?
Yes. Full-text search matches hidden keys and auto-expands the path to each result, letting you jump straight to the target entry.
Want to view as JSON?
Use the YAML to JSON tool, then browse with the JSON Viewer.