{ "title": "OCR PDF", "human_url": "https://happytails.ai/en/pdf-tools/ocr-pdf/", "agent_url": "https://happytails.ai/agents/en/pdf-tools/ocr-pdf/", "language": "en", "markdown_url": "https://happytails.ai/en/pdf-tools/ocr-pdf.md", "content": "OCR PDF\nAdd searchable English text to scanned PDF pages.\nHow to use OCR PDF\nChoose a file in PDF.\nReview the settings, then choose Run OCR PDF.\nReview the result, then use Copy result or a download link when available.\nWhat to expect\nAdd searchable English text to scanned PDF pages. Processed by the local, self-hosted engine. No third-party conversion service is used. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.", "content_format": "text/plain", "visibility": "public", "links": [], "tool": { "id": "ocr-pdf", "category": "pdf-tools", "built": true, "requirements": "Scanned pages, language selection and searchable text layer; measure recognition errors.", "implementation": { "fields": [ { "key": "language", "label": "OCR language", "value": "eng", "type": "select", "values": [ "eng" ] } ], "files": true, "accept": ".pdf", "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. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.", "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": null }, "mode": "explicit", "interactive": false }, "execution": "POST /api/v1/tools/ocr-pdf/run", "api": { "id": "ocr-pdf", "name": "OCR PDF", "category": "pdf-tools", "description": "Add searchable English text to scanned PDF pages.", "notes": "Processed by the local, self-hosted engine. No third-party conversion service is used. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.", "human_path": "/en/pdf-tools/ocr-pdf/", "method": "POST", "endpoint": "/api/v1/tools/ocr-pdf/run", "schema_url": "/api/v1/tools/ocr-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": { "language": { "type": "string", "description": "OCR language", "default": "eng", "enum": [ "eng" ] } } }, "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": "# OCR PDF\n\n- Human page: https://happytails.ai/en/pdf-tools/ocr-pdf/\n- Markdown: https://happytails.ai/en/pdf-tools/ocr-pdf.md\n- Structured JSON: https://happytails.ai/agents/en/pdf-tools/ocr-pdf/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `ocr-pdf` |\n| Category | pdf-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/ocr-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. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.\n\n### Inputs and settings\n\nNo free-text input is required. Use the file inputs and/or settings below.\n\nAccepted browser files: `.pdf`. Choose one file.\n\nBrowser file-input limit: 20971520 bytes in total. HTTP limits can differ.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `language` | OCR language | select | \"eng\" | Allowed: eng |\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/ocr-pdf/run\nContent-Type: application/json\n```\n\n[Detailed operation reference](https://happytails.ai/en/api/tools/ocr-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 \"language\": {\n \"type\": \"string\",\n \"description\": \"OCR language\",\n \"default\": \"eng\",\n \"enum\": [\n \"eng\"\n ]\n }\n }\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\nScanned pages, language selection and searchable text layer; measure recognition errors.\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\": \"ocr-pdf\",\n \"category\": \"pdf-tools\",\n \"built\": true,\n \"requirements\": \"Scanned pages, language selection and searchable text layer; measure recognition errors.\",\n \"implementation\": {\n \"fields\": [\n {\n \"key\": \"language\",\n \"label\": \"OCR language\",\n \"value\": \"eng\",\n \"type\": \"select\",\n \"values\": [\n \"eng\"\n ]\n }\n ],\n \"files\": true,\n \"accept\": \".pdf\",\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. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.\",\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\": null\n },\n \"mode\": \"explicit\",\n \"interactive\": false\n },\n \"execution\": \"POST /api/v1/tools/ocr-pdf/run\",\n \"api\": {\n \"id\": \"ocr-pdf\",\n \"name\": \"OCR PDF\",\n \"category\": \"pdf-tools\",\n \"description\": \"Add searchable English text to scanned PDF pages.\",\n \"notes\": \"Processed by the local, self-hosted engine. No third-party conversion service is used. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.\",\n \"human_path\": \"/en/pdf-tools/ocr-pdf/\",\n \"method\": \"POST\",\n \"endpoint\": \"/api/v1/tools/ocr-pdf/run\",\n \"schema_url\": \"/api/v1/tools/ocr-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 \"language\": {\n \"type\": \"string\",\n \"description\": \"OCR language\",\n \"default\": \"eng\",\n \"enum\": [\n \"eng\"\n ]\n }\n }\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\nAdd searchable English text to scanned PDF pages.\n\n## How to use OCR PDF\n\n1. Choose a file in PDF.\n2. Review the settings, then choose Run OCR PDF.\n3. Review the result, then use Copy result or a download link when available.\n\n## What to expect\n\nAdd searchable English text to scanned PDF pages. Processed by the local, self-hosted engine. No third-party conversion service is used. Creates a searchable PDF from rendered pages. Original vector content and forms are flattened. Up to 30 pages; review recognised text.\n" }