JSONLD MIME Type

About JSON-LD files

Best known from structured data for search engines: <script type="application/ld+json"> blocks in a page describe it as an Article, Product or FAQ with schema.org vocabulary. The browser doesn’t run these scripts; search engines read them.

File signature

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

Serve .jsonld with the right Content-Type

Content-Type: application/ld+json

application/ld+json jsonld;

AddType application/ld+json .jsonld

@jsonld path *.jsonld
header @jsonld Content-Type "application/ld+json"

curl -sI https://example.com/file.jsonld | grep -i '^content-type'
# Content-Type: application/ld+json

Set the type in code

res.set('Content-Type', 'application/ld+json');
// Or make the browser download it:
res.attachment('file.jsonld');

import mimetypes

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

mime.AddExtensionType(".jsonld", "application/ld+json")
w.Header().Set("Content-Type", "application/ld+json")

Accept .jsonld uploads

<input type="file" accept=".jsonld,application/ld+json">

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

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

More data and text

.txt , .csv , .tsv , .md , .ndjson , .yaml , .geojson , .ics , .sql . Look up any extension or type with the MIME type lookup.

Sources

• IANA registration: application/ld+json
• MDN: Common media types

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Frequently asked questions