Convert doc,xls,pdf,txt,html to other types of documents.

Effortless Format Transformation

The most cost effective conversion solution that just works. Convert documents seamlessly between multiple formats with our powerful Document Conversion API. Whether you need to transform text files, spreadsheets, presentations, or images, our API provides fast and accurate conversions, ensuring your content remains intact and accessible across different platforms.

Integrate our Document Conversion API into your workflow and unlock seamless cross-format compatibility.

Supported Conversions

Here is the graphic representation of the possible conversions.

https://interfaces.one/conversion/supported

Our API supports an extensive range of document and image conversions, including:

Text Documents

• DOC → PDF, DOCX, ODT, RTF, TXT, HTML, EPUB, XML
• DOCX → PDF, ODT, RTF, TXT, HTML, EPUB, XML
• ODT → PDF, DOCX, DOC, TXT, RTF, HTML, XML
• RTF → PDF, DOCX, ODT, TXT, HTML, XML
• TXT → PDF, DOCX, ODT, HTML, XML
• HTML → PDF, ODT, TXT
• XML → PDF, DOCX, ODT, TXT, HTML

Spreadsheets

• CSV → PDF, XLSX, ODS, HTML
• XLSX → PDF, ODS, CSV, HTML
• XLS → PDF, ODS, CSV, HTML
• ODS → PDF, XLSX, XLS, CSV, HTML

Presentations

• PPTX → PDF, ODP
• PPT → PDF, ODP
• ODP → PPTX, PDF

Images & Graphics

• SVG → PDF, PNG, JPG, TIFF
• JPG → PDF, PNG, SVG
• PNG → PDF, JPG, SVG
• BMP → PDF, JPG, PNG
• TIFF → PDF, JPG, PNG

Why Choose Our API?

• High Accuracy – Maintains the integrity of text, images, and layouts.
• Lightning-Fast – Rapid conversions with minimal latency.
• Developer-Friendly – Easy-to-use endpoints with detailed documentation.
• Scalable & Secure – Built for high-volume processing with enterprise-grade security.

API End Points

The end point for connecting : If you subscribe directly from us use this endpoint.

	https://api.interfaces.one

API Documentation

Scheduling the conversion

POST /document/convert
    parameters
            input = <file>
            target = <target format> // pdf/xls/...etc

The above call should produce something like the following

{
    "success": {
        "total": 5
    },
    "contents": {
        "id": "conv_iaJoGf8vpWs8B8UUuG_JkAeF",
        "status": "Accepted",
        "server_time_now": "2025-03-07T15:45:23.760697Z",
        "check_back_at": "2025-03-07T15:50:23.760703Z",
        "check_back_seconds": 300
    },
    "copyright": {
        "url": "api.interfaces.one",
        "year": "2025"
    }
}

Checking status of the conversion

GET /document/convert/status
    parameters
            id = <conversion id>

The above call should return something like the following

{
    "success": {
        "total": 1
    },
    "contents": [
        {
            "id": "conv_Dp_PnWa8yIcKImJmFJkkkAeF",
            "status": "Success",
            "converted_file": "JVBERi0xLjcK.."
            "target": "pdf",
            "server_time_now": "2025-03-07T15:41:06.842307Z",
            "file_expires_at": "2025-03-07T15:46:06.842318Z"
        }
    ],
    "copyright": {
        "url": "api.interfaces.one",
        "year": "2025"
    }
}

Ratelimiting

Some of our API calls may be public(requires free API key) , while others requires paid subscription. To maintain our serice levels both public and private API endpoints are ratelimited. Please consult your specific plan that you subscribed to for the rate limit details.

Authentication

Currently we support API Key based authentication. Please set your Autorization Bearer request header with value of your API key. Alternatively you can also pass api_key= as a request parameter, though we strongly discourage this mode of passing the key, since it will allow others to see your key.

In curl this would mean sending the Authorization header like below.

            
 curl -i <url> -H "Authorization: Bearer <api_key>"
            
            

If you are using PHP.

            
$authorization = "Authorization: Bearer <api_key>";
$ch = curl_init('<url>'); // Initialise cURL
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json' , $authorization ));
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); // OR GET
$result = curl_exec($ch);
curl_close($ch);
            
            

In javascript you can use headers key to add the authorization header

            
$.ajax({
   url: '<url>'
   type: 'GET',
   contentType: 'application/json'
   headers: {
      'Authorization': 'Bearer <api_key>'
   },
   success: function (result) {
       // CallBack(result);
   },
   error: function (error) {

   }
});