# Convert PDF to HTML
Convert PDF text into readable, page-aware HTML.
## API Overview
- **HTTP Protocol:** HTTPS
- **HTTP Method:** POST
- **HTTP Endpoint:** https://api.gugudata.io/v1/imagerecognition/pdf2html
- **Response Type:** application/json; charset=utf-8
- **DEMO Endpoint:** https://api.gugudata.io/v1/imagerecognition/pdf2html/demo
- **Live Demo:** https://gugudata.io/demo/pdf2html
- **Postman:** https://www.postman.com/gugudata/gugudata-io
- **LLM Page:** https://gugudata.io/details/pdf2html/llm
- **Raw Markdown:** https://gugudata.io/details/pdf2html/llm.md
## Remote MCP
- **MCP Endpoint:** https://mcp.gugudata.io/mcp
- **MCP Guide:** https://gugudata.io/mcp/
- **Authorization:** OAuth authorization opens in the browser; do not paste appkeys into MCP clients.
- **Tool Scope:** MCP clients receive GuGuData API tools available to the authorized account.
## Data & API Features
- Readable HTML: Turn existing PDF text into a browser-friendly document.
- Page-aware output: Keep page order and line breaks in numbered sections.
- Multilingual text: Extract readable text already present in multilingual PDFs.
- Upload or link input: Send a PDF upload or a publicly accessible PDF URL.
- Browser-ready downloads: Open the generated HTML or save a local copy.
- Document workflows: Prepare text for search, indexing, and content processing.
## API Request Parameters
| Name | Type | Is Required | Default Value | Remark |
| --- | --- | --- | --- | --- |
| appkey | string | true | YOUR_APPKEY | API key used to authenticate the request. |
| file | file | false | | PDF up to 20 MiB and 100 pages. Provide exactly one of file or file_url. |
| file_url | string | false | https://storage.gugudata.io/pdf/demo.pdf | Public HTTP/HTTPS PDF URL, at most 2048 characters. Use instead of file. |
## API Response Parameters
| Name | Type | Remark |
| --- | --- | --- |
| htmlUrl | string | Public HTTPS URL of readable UTF-8 HTML. Download your own copy; permanent availability is not guaranteed. |
## API Response Status Codes
| Status Code | Explanation of Status Code | Remarks |
| --- | --- | --- |
| 200 | Request processed successfully. | Some endpoints expose a separate application-level status field in the response body, such as `dataStatus.statusCode`. |
| 400 | Invalid request parameters or request format. | Check required fields, data types, and request body format. |
| 401 | Missing or unknown application key. | Provide a valid `appkey` with the request. |
| 403 | The application key is recognized but access is not allowed. | The key may be expired, inactive, or not permitted for the requested API. |
| 413 | PDF exceeds the size or page limit. | Use a PDF of at most 20 MiB and 100 pages. |
| 422 | PDF cannot be converted. | Check that the PDF is readable, unencrypted, and contains text. Output must not exceed 20 MiB. |
| 429 | Request rate or trial usage limit exceeded. | Reduce request frequency and retry with backoff. If a trial allowance is exhausted, check Trial Keys for remaining requests and subscribe to continue. |
| 500 | Internal service error. | Retry later or contact support if the error persists. |
| 502 | PDF retrieval or conversion response failed. | Check that the uploaded PDF is readable and retry. For URL input, also check that the public PDF URL can be downloaded. |
| 503 | Conversion is temporarily unavailable. | Try again later. |
## cURL Example
```bash
curl --location 'https://api.gugudata.io/v1/imagerecognition/pdf2html?appkey=YOUR_APPKEY' --form 'file=@localfile_path.pdf'
```