YAML Viewer
WebRender YAML with collapsible structure and syntax highlighting. Navigate large config files and jump between keys without losing your place.
About YAML Viewer
YAML expresses hierarchy through indentation, so long files make it hard to see which level a key belongs to. This tool parses YAML and renders it as a collapsible tree locally in your browser, clearly showing nesting, list items, and anchor references. All processing is local and nothing is uploaded — safe for configs with sensitive info. Tip: Bookmark this tool for quick access during your web development work. All processing happens locally in your browser with no installation required.
How to Use
- Open the YAML Viewer tool page
- Enter or paste your data into the input area
- View the real-time results and use the copy button to get the output
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.
Want to view as JSON?
Use the YAML to JSON tool, then browse with the JSON Viewer.
Any browser compatibility requirements?
This tool works in all modern browsers (Chrome, Firefox, Edge, Safari). No plugins or extensions required.
Can I use it offline?
After initial load, most features work offline. The core logic runs entirely in your browser with no network dependency.
Comments
Comments are stored locally in your browser. Configure Giscus for cloud-based comments.