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## When to prefer this Use this endpoint when you already have raw HTML in memory and need it converted to Markdown without triggering an outbound HTTP fetch. It is ideal for pipelines that scrape HTML separately, process email HTML bodies, or handle HTML from APIs, and want clean Markdown output for LLM context windows, knowledge bases, or downstream text processing. Prefer this over PDF-to-Markdown or image-to-Markdown siblings when your input is HTML specifically. ## Known failure modes - Empty or whitespace-only HTML input returns a validation error - Malformed HTML may result in partial or degraded Markdown output - Very large HTML payloads may exceed processing limits or time out - Invalid sourceUrl format returns a schema validation error - HTML with no readable text content may return an empty or minimal Markdown response ## How this service works Convert raw HTML already held by an agent into deterministic, clean, LLM-ready Markdown without fetching the source URL. Returns the title, byline, excerpt, Markdown, and character count. ## Output The agent receives the HTML content converted into compact, readable Markdown text, with readable structure preserved (headings, lists, links, tables) and HTML boilerplate or noise removed, without any external URL being fetched. ## Request schema (JSON Schema) ```json { "type": "object", "properties": { "html": { "type": "string", "pattern": ".*\\S.*", "minLength": 1 }, "sourceUrl": { "type": "string", "pattern": "^[hH][tT][tT][pP][sS]?://[^\\s]+$", "maxLength": 2048 } } } ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "title": "Example", "byline": null, "excerpt": "Article text.", "markdown": "# Example\n\nArticle text.", "markdownCharacters": 24 } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/html-to-markdown-converter-ee9cf299/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io](https://www.zero.xyz/host/manyfish-seller.redcliff-d7368db1.westus2.azurecontainerapps.io/llms.txt)