YAML Viewer
YAML Viewer — view YAML as a collapsible tree of keys and values. It runs entirely in your browser, so nothing is uploaded and it works fully offline.
YAML Viewer is a browser-based web developer tool on WebDevToolsBase. YAML Viewer — view YAML as a collapsible tree of keys and values. It runs entirely in your browser, so nothing is uploaded and it works fully offline. To use it, paste your input and view the result directly in your browser — no signup and nothing to install.
YAML Viewer is a free YAML Tools utility that runs entirely in your browser — nothing you enter is uploaded.
Converts one document using JSON-compatible values and string mapping keys. Numbers that would change during conversion, negative zero, nonfinite values, timestamps, binary data, sets, ordered maps, pairs, merge keys, cycles and unknown tags are rejected. Quote values only when text is intended; this changes their type. Ordinary aliases are expanded for JSON. Comments, quote style and numeric spelling are not retained. Limits: 2 MiB of text, 50,000 expanded values and 100 nesting levels.
How to use YAML Viewer
- Paste one YAML document to build an expandable view of supported values.
- Expand or collapse objects and arrays to inspect their keys and values.
- Resolve any syntax or unsupported-value error before relying on the preview.
- Copy YAML copies the current source text, including unfinished edits. It does not export the displayed tree.
About this tool
This browser tool works with the supported JSON-compatible subset of YAML described above. A completed result means that this conversion succeeded; it does not validate an application schema, a deployment configuration or another programming language’s parser.
Keep the original source before formatting or conversion. Formatting normalizes presentation and removes comments. The operation runs locally in this browser and does not upload the entered document to a conversion service.
Frequently asked questions
What does YAML Viewer do?
YAML Viewer runs entirely on your device: add your input, and it processes it locally in real time.
Is YAML Viewer free to use?
Yes — YAML Viewer is completely free, with no usage limits.
Where is my data processed by YAML Viewer?
Entirely in your browser — YAML Viewer keeps your data on your own machine and sends nothing anywhere.
How does YAML Viewer handle YAML indentation errors?
YAML Viewer reports the problem inline so you can fix the indentation, all within your browser.
Does YAML Viewer work offline?
Once the page has loaded, YAML Viewer keeps working with no network connection.