HTML to YAML Converterv1.0.0

Paste or upload any HTML markup to transform it into a clean YAML representation. The converter parses the document structure using the browser's built-in DOM parser, then walks the element tree to produce nested YAML keys that mirror the original hierarchy. Attributes, text content, and repeated sibling elements are all captured and labeled according to configurable rules.

• Enter or paste HTML source code into the HTML Source textarea. The input can be a full document with doctype, head, and body tags, or a partial fragment containing only the elements you want to convert.
• Alternatively, click Or Upload a File to load an .html, .htm, or .txt file from your local system. The file contents will populate the source textarea automatically.
• Press the Convert button to parse the HTML and generate YAML output. The result appears in the YAML Output textarea below, reflecting the element hierarchy as nested YAML keys.
• Open the Settings panel to adjust conversion behavior. The Indentation Spaces field controls how many spaces each nesting level uses in the output, with a default of two. Array Style determines whether repeated sibling elements render in block format (one item per line with a dash prefix) or flow format (inline bracketed notation).
• The Empty Element Handling dropdown specifies how elements with no text content and no children appear in the output: as an explicit null value, as an empty string, or omitted entirely.
• Toggle Include Attributes to control whether HTML attributes appear in the YAML output. When enabled, attributes are nested under each element using the prefix specified in the Attribute Prefix field (default "@"). For example, an element with class="main" produces a key named @class with value "main".
• The Text Content Key field sets the YAML key name for an element's direct text content when that element also has attributes or child elements. The default value is "#text".
• Click Copy Output to place the generated YAML on your clipboard, or click Download YAML to save the output as a .yaml file.
• Press Reset to clear all inputs, restore default settings, and remove any saved state.

Transforming HTML into YAML opens up a range of workflows across web development, content management, configuration authoring, and data migration. Below are practical scenarios where this converter adds value.

• Static Site Generation: Extract the structure of an existing HTML page and convert it into a YAML data file that a static site generator such as Jekyll or Hugo can consume. Feed headings, paragraphs, and list items into a content model without manual retyping.
• CMS Migration: Pull HTML content from a legacy content management system export and reshape it into YAML records that match the schema of a new headless CMS. Map element names to content type fields during the import pipeline.
• Configuration Authoring: Convert an HTML form layout into a YAML specification that describes each field's type, label, and default value. Hand the YAML file to a form-rendering engine that dynamically builds the UI from the spec.
• API Documentation: Parse HTML tables that describe API endpoints, parameters, and response codes into YAML structures compatible with OpenAPI or AsyncAPI specification files. Reduce manual transcription errors when documenting RESTful services.
• Template Auditing: Convert email or landing-page HTML templates into YAML trees to inspect nesting depth, attribute usage, and element distribution. Compare two YAML snapshots with a diff tool to spot structural changes between template revisions.
• Accessibility Review: Flatten an HTML page into YAML to quickly scan which elements carry aria attributes, alt text, or role annotations. Filter the YAML output for attribute prefix keys to produce a focused accessibility checklist.
• Educational Reference: Demonstrate how a browser's DOM parser interprets raw HTML by showing the resulting tree in a human-readable YAML format. Students and instructors can compare malformed markup with its parsed output to learn how missing closing tags or misplaced elements are resolved.
• Test Fixture Creation: Generate YAML test fixtures from sample HTML responses returned by web scrapers or HTTP clients. Store the expected parsed structure alongside integration tests so assertions compare YAML snapshots instead of fragile string matches.