{ "title": "EPUB to PDF", "human_url": "https://happytails.ai/en/document-tools/epub-to-pdf/", "agent_url": "https://happytails.ai/agents/en/document-tools/epub-to-pdf/", "language": "en", "markdown_url": "https://happytails.ai/en/document-tools/epub-to-pdf.md", "content": "EPUB to PDF\nConvert EPUB files to PDF with the available format settings.\nUseful next steps\nMarkdown to PDF\nRender defined Markdown dialect with print CSS, fonts and page breaks.\nMerge PDF\nCombine PDF files into one document.\nCompress PDF\nRewrite PDF objects and streams to reduce avoidable file overhead.\nHow to use EPUB to PDF\nChoose a file in EPUB.\nReview the settings, then choose Convert file.\nReview the result, then use Copy result or a download link when available.\nWhat to expect\nConvert EPUB files to PDF with the available format settings. Processed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.", "content_format": "text/plain", "visibility": "public", "links": [ { "name": "Markdown to PDF Render defined Markdown dialect with print CSS, fonts and page breaks.", "url": "https://happytails.ai/en/document-tools/markdown-to-pdf/" }, { "name": "Merge PDF Combine PDF files into one document.", "url": "https://happytails.ai/en/pdf-tools/merge-pdf/" }, { "name": "Compress PDF Rewrite PDF objects and streams to reduce avoidable file overhead.", "url": "https://happytails.ai/en/pdf-tools/compress-pdf/" } ], "tool": { "id": "epub-to-pdf", "category": "document-tools", "built": true, "requirements": "Reflow to chosen page size with readable fonts/TOC; disclose DRM and layout limitations.", "implementation": { "fields": [], "files": true, "accept": ".epub", "multiple": false, "input": false, "processing": "Server required", "native": true, "maxFileBytes": 20971520, "note": "Processed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.", "experience": { "automatic": false, "single": false, "label": "Your text", "placeholder": "Type or paste your input…", "help": "Up to 1,000,000 characters. Review the settings before running.", "action": "Convert file" }, "mode": "explicit", "interactive": false }, "execution": "POST /api/v1/tools/epub-to-pdf/run", "api": { "id": "epub-to-pdf", "name": "EPUB to PDF", "category": "document-tools", "description": "Convert EPUB files to PDF with the available format settings.", "notes": "Processed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.", "human_path": "/en/document-tools/epub-to-pdf/", "method": "POST", "endpoint": "/api/v1/tools/epub-to-pdf/run", "schema_url": "/api/v1/tools/epub-to-pdf", "input_schema": { "type": "object", "additionalProperties": false, "properties": { "input": { "type": "string", "maxLength": 1000000, "default": "", "description": "Plain text input. File tools use files instead unless otherwise documented." }, "options": { "type": "object", "additionalProperties": false, "properties": {} }, "files": { "type": "array", "maxItems": 1, "items": { "type": "object", "required": [ "name", "base64" ], "additionalProperties": false, "properties": { "name": { "type": "string", "maxLength": 200, "description": "Filename only, no path." }, "mime": { "type": "string", "maxLength": 150 }, "bytes": { "type": "integer", "minimum": 0, "description": "Optional decoded byte count; must match content if supplied." }, "base64": { "type": "string", "contentEncoding": "base64", "description": "File bytes as padded base64. Use the tool-specific limits.files_bytes value for the total decoded input size." } } } } } }, "output_schema": { "type": "object", "required": [ "tool", "result" ], "properties": { "tool": { "type": "string" }, "result": { "type": "object", "required": [ "text", "files" ], "properties": { "text": { "type": [ "string", "null" ] }, "data": { "description": "Parsed JSON when the textual result is JSON." }, "name": { "type": "string" }, "mime": { "type": "string" }, "files": { "type": "array", "items": { "type": "object", "required": [ "name", "mime", "bytes", "base64" ], "properties": { "name": { "type": "string" }, "mime": { "type": "string" }, "bytes": { "type": "integer" }, "base64": { "type": "string", "contentEncoding": "base64" } } } } } } } }, "processing": "Server; self-hosted native engine, no external conversion service", "limits": { "request_bytes": 31457280, "input_characters": 1000000, "files_bytes": 20971520, "max_files": 1, "timeout_seconds": 90 } }, "agent_processing": "Server; self-hosted native engine, no external conversion service", "browser_agent": { "supported": true, "name": "run_current_tool", "discovery": "WebMCP on the human page in a supporting browser", "verification": "See audit/API-AUDIT.md; availability is not verification" } }, "markdown": "# EPUB to PDF\n\n- Human page: https://happytails.ai/en/document-tools/epub-to-pdf/\n- Markdown: https://happytails.ai/en/document-tools/epub-to-pdf.md\n- Structured JSON: https://happytails.ai/agents/en/document-tools/epub-to-pdf/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `epub-to-pdf` |\n| Category | document-tools |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Server required |\n| HTTP API | /api/v1/tools/epub-to-pdf/run |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nProcessed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.\n\n### Inputs and settings\n\nNo free-text input is required. Use the file inputs and/or settings below.\n\nAccepted browser files: `.epub`. Choose one file.\n\nBrowser file-input limit: 20971520 bytes in total. HTTP limits can differ.\n\nNo additional settings are declared for this tool.\n\n### HTTP contract\n\nAPI calls process supplied data on the server. The website origin is `https://happytails.ai`. Server API hosting is not connected on the public website yet. Use your local server origin to test these requests.\n\n```http\nPOST https://happytails.ai/api/v1/tools/epub-to-pdf/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/epub-to-pdf.md) · [Shared API guide](https://happytails.ai/en/api.md)\n\n#### Limits\n\n| Limit | Value |\n| --- | --- |\n| request_bytes | 31457280 |\n| input_characters | 1000000 |\n| files_bytes | 20971520 |\n| max_files | 1 |\n| timeout_seconds | 90 |\n\n#### Complete input schema\n\n```json\n{\n \"type\": \"object\",\n \"additionalProperties\": false,\n \"properties\": {\n \"input\": {\n \"type\": \"string\",\n \"maxLength\": 1000000,\n \"default\": \"\",\n \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n },\n \"options\": {\n \"type\": \"object\",\n \"additionalProperties\": false,\n \"properties\": {}\n },\n \"files\": {\n \"type\": \"array\",\n \"maxItems\": 1,\n \"items\": {\n \"type\": \"object\",\n \"required\": [\n \"name\",\n \"base64\"\n ],\n \"additionalProperties\": false,\n \"properties\": {\n \"name\": {\n \"type\": \"string\",\n \"maxLength\": 200,\n \"description\": \"Filename only, no path.\"\n },\n \"mime\": {\n \"type\": \"string\",\n \"maxLength\": 150\n },\n \"bytes\": {\n \"type\": \"integer\",\n \"minimum\": 0,\n \"description\": \"Optional decoded byte count; must match content if supplied.\"\n },\n \"base64\": {\n \"type\": \"string\",\n \"contentEncoding\": \"base64\",\n \"description\": \"File bytes as padded base64. Use the tool-specific limits.files_bytes value for the total decoded input size.\"\n }\n }\n }\n }\n }\n}\n```\n\n#### Complete output schema\n\n```json\n{\n \"type\": \"object\",\n \"required\": [\n \"tool\",\n \"result\"\n ],\n \"properties\": {\n \"tool\": {\n \"type\": \"string\"\n },\n \"result\": {\n \"type\": \"object\",\n \"required\": [\n \"text\",\n \"files\"\n ],\n \"properties\": {\n \"text\": {\n \"type\": [\n \"string\",\n \"null\"\n ]\n },\n \"data\": {\n \"description\": \"Parsed JSON when the textual result is JSON.\"\n },\n \"name\": {\n \"type\": \"string\"\n },\n \"mime\": {\n \"type\": \"string\"\n },\n \"files\": {\n \"type\": \"array\",\n \"items\": {\n \"type\": \"object\",\n \"required\": [\n \"name\",\n \"mime\",\n \"bytes\",\n \"base64\"\n ],\n \"properties\": {\n \"name\": {\n \"type\": \"string\"\n },\n \"mime\": {\n \"type\": \"string\"\n },\n \"bytes\": {\n \"type\": \"integer\"\n },\n \"base64\": {\n \"type\": \"string\",\n \"contentEncoding\": \"base64\"\n }\n }\n }\n }\n }\n }\n }\n}\n```\n\n#### Error and retry handling\n\nFailures return a non-200 status and `error.code` plus `error.message`. Correct invalid input before retrying; retry server-busy responses with bounded backoff. Returned files contain Base64 data, not persistent download URLs. Decode and inspect the output before treating conversion as successful. See the shared API guide for the complete status and timeout rules.\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nReflow to chosen page size with readable fonts/TOC; disclose DRM and layout limitations.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n \"id\": \"epub-to-pdf\",\n \"category\": \"document-tools\",\n \"built\": true,\n \"requirements\": \"Reflow to chosen page size with readable fonts/TOC; disclose DRM and layout limitations.\",\n \"implementation\": {\n \"fields\": [],\n \"files\": true,\n \"accept\": \".epub\",\n \"multiple\": false,\n \"input\": false,\n \"processing\": \"Server required\",\n \"native\": true,\n \"maxFileBytes\": 20971520,\n \"note\": \"Processed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.\",\n \"experience\": {\n \"automatic\": false,\n \"single\": false,\n \"label\": \"Your text\",\n \"placeholder\": \"Type or paste your input…\",\n \"help\": \"Up to 1,000,000 characters. Review the settings before running.\",\n \"action\": \"Convert file\"\n },\n \"mode\": \"explicit\",\n \"interactive\": false\n },\n \"execution\": \"POST /api/v1/tools/epub-to-pdf/run\",\n \"api\": {\n \"id\": \"epub-to-pdf\",\n \"name\": \"EPUB to PDF\",\n \"category\": \"document-tools\",\n \"description\": \"Convert EPUB files to PDF with the available format settings.\",\n \"notes\": \"Processed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.\",\n \"human_path\": \"/en/document-tools/epub-to-pdf/\",\n \"method\": \"POST\",\n \"endpoint\": \"/api/v1/tools/epub-to-pdf/run\",\n \"schema_url\": \"/api/v1/tools/epub-to-pdf\",\n \"input_schema\": {\n \"type\": \"object\",\n \"additionalProperties\": false,\n \"properties\": {\n \"input\": {\n \"type\": \"string\",\n \"maxLength\": 1000000,\n \"default\": \"\",\n \"description\": \"Plain text input. File tools use files instead unless otherwise documented.\"\n },\n \"options\": {\n \"type\": \"object\",\n \"additionalProperties\": false,\n \"properties\": {}\n },\n \"files\": {\n \"type\": \"array\",\n \"maxItems\": 1,\n \"items\": {\n \"type\": \"object\",\n \"required\": [\n \"name\",\n \"base64\"\n ],\n \"additionalProperties\": false,\n \"properties\": {\n \"name\": {\n \"type\": \"string\",\n \"maxLength\": 200,\n \"description\": \"Filename only, no path.\"\n },\n \"mime\": {\n \"type\": \"string\",\n \"maxLength\": 150\n },\n \"bytes\": {\n \"type\": \"integer\",\n \"minimum\": 0,\n \"description\": \"Optional decoded byte count; must match content if supplied.\"\n },\n \"base64\": {\n \"type\": \"string\",\n \"contentEncoding\": \"base64\",\n \"description\": \"File bytes as padded base64. Use the tool-specific limits.files_bytes value for the total decoded input size.\"\n }\n }\n }\n }\n }\n },\n \"output_schema\": {\n \"type\": \"object\",\n \"required\": [\n \"tool\",\n \"result\"\n ],\n \"properties\": {\n \"tool\": {\n \"type\": \"string\"\n },\n \"result\": {\n \"type\": \"object\",\n \"required\": [\n \"text\",\n \"files\"\n ],\n \"properties\": {\n \"text\": {\n \"type\": [\n \"string\",\n \"null\"\n ]\n },\n \"data\": {\n \"description\": \"Parsed JSON when the textual result is JSON.\"\n },\n \"name\": {\n \"type\": \"string\"\n },\n \"mime\": {\n \"type\": \"string\"\n },\n \"files\": {\n \"type\": \"array\",\n \"items\": {\n \"type\": \"object\",\n \"required\": [\n \"name\",\n \"mime\",\n \"bytes\",\n \"base64\"\n ],\n \"properties\": {\n \"name\": {\n \"type\": \"string\"\n },\n \"mime\": {\n \"type\": \"string\"\n },\n \"bytes\": {\n \"type\": \"integer\"\n },\n \"base64\": {\n \"type\": \"string\",\n \"contentEncoding\": \"base64\"\n }\n }\n }\n }\n }\n }\n }\n },\n \"processing\": \"Server; self-hosted native engine, no external conversion service\",\n \"limits\": {\n \"request_bytes\": 31457280,\n \"input_characters\": 1000000,\n \"files_bytes\": 20971520,\n \"max_files\": 1,\n \"timeout_seconds\": 90\n }\n },\n \"agent_processing\": \"Server; self-hosted native engine, no external conversion service\",\n \"browser_agent\": {\n \"supported\": true,\n \"name\": \"run_current_tool\",\n \"discovery\": \"WebMCP on the human page in a supporting browser\",\n \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n }\n}\n```\n\n## Page guide\n\nConvert EPUB files to PDF with the available format settings.\n\n## Useful next steps\n\n- [Markdown to PDF](https://happytails.ai/en/document-tools/markdown-to-pdf/): Render defined Markdown dialect with print CSS, fonts and page breaks. ([Markdown](https://happytails.ai/en/document-tools/markdown-to-pdf.md))\n\n- [Merge PDF](https://happytails.ai/en/pdf-tools/merge-pdf/): Combine PDF files into one document. ([Markdown](https://happytails.ai/en/pdf-tools/merge-pdf.md))\n\n- [Compress PDF](https://happytails.ai/en/pdf-tools/compress-pdf/): Rewrite PDF objects and streams to reduce avoidable file overhead. ([Markdown](https://happytails.ai/en/pdf-tools/compress-pdf.md))\n\n## How to use EPUB to PDF\n\n1. Choose a file in EPUB.\n2. Review the settings, then choose Convert file.\n3. Review the result, then use Copy result or a download link when available.\n\n## What to expect\n\nConvert EPUB files to PDF with the available format settings. Processed by the local, self-hosted engine. No third-party conversion service is used. Reflows unencrypted EPUB content onto A4 pages. Does not remove DRM.\n" }