Why use a browser YAML editor?
A dedicated YAML editor is faster than a generic text editor when you are debugging a config file. Live validation tells you the moment a missing colon or stray indent breaks the parser, instead of waiting for a CI run or a deploy command to fail. Syntax highlighting makes it easier to scan for keys, values, and comments. Autosave guarantees you do not lose work if you close the tab.
What this editor offers
- Live YAML 1.2 validation - line-and-column error messages update as you type, with no manual save.
- Syntax highlighting - separate colors for keys, scalars, comments, and structural punctuation via highlight.js.
- localStorage autosave - your draft is saved automatically every 500ms, locally on your device only.
- Upload, download, share - drop in a .yml or .yaml file, or generate a shareable URL with the content embedded.
- Privacy-first - the editor runs in your browser, so your YAML never leaves your device.
Editor vs validator vs formatter - which do I need?
The editor is for writing and editing. The validator is for a one-shot syntax check. The formatter is for normalizing whitespace and indentation across an existing file. Most workflows use all three: edit in the editor, run through the formatter for diff-clean output, and validate before committing.
FAQs
What is the YAML editor?
It is a free browser-based YAML editor with live validation, syntax highlighting, and localStorage autosave. You can edit any YAML file - Kubernetes manifests, GitHub Actions, Docker Compose, OpenAPI specs - and see errors with line and column numbers as you type.
Do I need to install anything?
No. The editor runs entirely in your browser. There is no signup, no extension, and no installation. Just open the page and start editing.
Is my YAML saved automatically?
Yes. The editor autosaves your work to your browser's localStorage every half second. When you return to the page, your last draft is loaded automatically. The autosave is local to your device only.
Does the editor validate YAML in real time?
Yes. As you type, the editor parses your YAML against the YAML 1.2 spec and shows the line and column of any syntax error. The validation status updates instantly without an explicit save action.
Can I share my YAML draft?
Yes. Click Share to generate a URL that encodes your YAML in the query string. Anyone who opens that URL sees the same content. Sensitive YAML should not be shared this way because the URL itself contains the data.
Is my data sent to a server?
No. All editing, validation, and saving happens in your browser. Your YAML never leaves your device, which makes the editor safe for secrets, internal config, and proprietary infrastructure files.
Does the editor support YAML 1.2 features?
Yes. Anchors, aliases, merge keys, block scalars (literal | and folded >), tagged values, and standard scalar types are all supported during validation.
How big a YAML file can I edit?
The editor handles up to 5 MB. localStorage browser limits are typically around 5 to 10 MB per origin, so very large drafts may not autosave on some browsers.
Can I download my YAML?
Yes. Click Download to save the current editor content as a .yaml file. You can also copy it to your clipboard with the Copy button or convert it to JSON via the linked converter.
Is there syntax highlighting in the editor?
Yes. The preview panel shows your YAML with syntax highlighting via highlight.js, including separate colors for keys, scalars, comments, and structural punctuation.