What is MIME type "text/vnd.hocr+html"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

text/vnd.hocr+html defines files that contain OCR results in an HTML format. It uses the hOCR standard to embed details like text layout and word positioning directly into the HTML code.
This format makes it easy for programs and browsers to display recognized text along with its spatial metadata. Software—often OCR engines such as Tesseract—generates these files when converting images of text into searchable, selectable text.

Stores OCR results with layout and coordinate data.
Enables overlaying text on scanned images.
Supports document indexing and digital archiving.

Files using this MIME type are typically saved with the HTML or HOCR extension.

Associated file extensions

.html, .hocr

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: text/vnd.hocr+html

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="text/vnd.hocr+html">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'text/vnd.hocr+html');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.html, .hocr

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.