RSS MIME Type

About RSS feed files

Link the feed from your pages with <link rel="alternate" type="application/rss+xml" title="Blog" href="/feed.xml">, so readers and browser extensions find it. Atom feeds use application/atom+xml. Many feeds are served as application/xml or text/xml, which feed readers accept just as well.

Other types seen for these files: application/atom+xml , application/xml , text/xml . Accept them when reading uploads, but send application/rss+xml yourself.

File signature

RSS has no fixed signature: it is text without a magic number, so validate uploads by parsing the content rather than by checking bytes.

Serve .rss with the right Content-Type

Content-Type: application/rss+xml; charset=utf-8

application/rss+xml rss;

AddType application/rss+xml .rss
AddCharset UTF-8 .rss

@rss path *.rss
header @rss Content-Type "application/rss+xml; charset=utf-8"

curl -sI https://example.com/file.rss | grep -i '^content-type'
# Content-Type: application/rss+xml; charset=utf-8

Set the type in code

res.set('Content-Type', 'application/rss+xml; charset=utf-8');

import mimetypes

mimetypes.add_type('application/rss+xml', '.rss')  # if your system doesn't know it
mimetypes.guess_type('file.rss')[0]  # 'application/rss+xml'

mime.AddExtensionType(".rss", "application/rss+xml; charset=utf-8")
w.Header().Set("Content-Type", "application/rss+xml; charset=utf-8")

Accept .rss uploads

<input type="file" accept=".rss,application/rss+xml">

The accept attribute only filters the file picker; users can still choose another file. Listing the extension as well as the type matters, because operating systems don’t always report the type you expect.

Related types

• .xml (application/xml): XML
• .html (text/html): HTML
• .json (application/json): JSON

More web

.css , .js , .mjs , .svg , .wasm , .webmanifest , .vtt . Look up any extension or type with the MIME type lookup.

Sources

• IANA Media Types registry (not listed)
• MDN: Common media types

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Frequently asked questions