Cloudmersive Document and Data Conversion API
Overview
The Cloudmersive Convert API lets you convert documents, images, and web pages between formats — including Word to PDF, HTML to image, and more — with a simple REST call. It provides both conversion and manipulation capabilities like merging PDFs or extracting text. A free tier with 800 API calls per month makes it accessible for small projects.
Beginner Tip
Cloudmersive returns the converted file as a base64-encoded string or binary in the response body — make sure to handle the response as binary when writing the output file to disk.
Available Data
Example Response
{
"status": "success",
"data": {
"result": "Data from Cloudmersive Document and Data Conversion",
"description": "HTML/URL to PDF/PNG, Office documents to PDF, image conversion",
"timestamp": "2025-01-15T10:00:00Z"
}
} Field Reference
(binary) For most endpoints the response body is the raw converted file (PDF, PNG, etc.). Successful In JSON responses, indicates whether the operation completed without errors. OutputBytes Base64-encoded bytes of the output file, returned by some endpoints instead of raw binary. TextResult Extracted plain text content, returned by text-extraction endpoints. PageCount Number of pages in the output document, returned by document info endpoints. Implementation Example
const url = "https://cloudmersive.com/convert-api";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
headers: {
"X-API-Key": "YOUR_API_KEY"
}
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Partially tested on Apr 5, 2026
Technical Specifications
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