The embed and object Elements

<embed> embeds external content using a browser plugin or the browser's built-in handler. Its type attribute specifies the MIME type; src is the resource URL. It is a void element with no children or fallback content.

<object> is more flexible than embed. Its data attribute points to the resource; type specifies MIME type. Children serve as fallback content if the object cannot be loaded — including a nested object or descriptive text.

Nest fallback: <object data="file.pdf" type="application/pdf"><a href="file.pdf">Download PDF</a></object>. If the browser cannot render the PDF inline, it shows the download link instead. Fallback content is the main advantage of object over embed.

Embed PDF files with object or embed: <object data="doc.pdf" type="application/pdf" width="100%" height="600">. Browser support varies — Chrome and Firefox render PDFs natively; other browsers may show a download prompt. Provide a fallback link.

For embedding HTML documents: prefer iframe (designed for this purpose, clear security model). For media plugins: embed (legacy Flash, SVG rendering). For documents with fallback: object. In modern development, most plugin use cases are handled by native HTML5 elements (video, audio, canvas).

Both embed and object can execute plugin content (historically Flash) which is a major attack surface. Modern browsers have removed plugin support. Only trusted content should be embedded. Cross-origin embed/object content cannot be scripted like same-origin content.

Embedding SVG with object: <object data="image.svg" type="image/svg+xml" width="200" height="200">. Unlike an img tag, SVG inside object can run its own scripts and respond to external CSS (if same-origin). Use for interactive SVG when inline SVG is impractical.

Pass parameters to an object plugin using nested <param name="autoplay" value="true"> elements. This was the standard way to configure Flash objects. Modern usage is rare since plugin support has been removed from browsers.

object can work with usemap to create image maps — clickable regions on an embedded image. Define regions in a <map> element with <area> children. Modern SVG with href on elements is a better approach for interactive image regions.

Add title attribute to both embed and object for screen reader identification. object accepts aria-label. Neither element provides the rich accessibility semantics that native HTML5 elements offer. For media content, native video and audio elements with captions are always preferred.

embed and object are largely legacy elements. Their primary use case (Flash) is gone. Current legitimate uses: inline PDF documents (with fallback), interactive SVG embedding, and legacy content that cannot be modernized. New projects should favor native HTML5 elements for all media needs.

What is the main advantage of using object over embed for embedded content?

embed and object are legacy elements for embedding non-HTML content. object is preferred when fallback content is needed. Both accept MIME type specifications and pass parameters. Modern equivalents (video, audio, canvas, inline SVG) are preferred for new projects. PDF embedding via object remains a common use case with iframe as an alternative.