What is the MIME type of .jsonld files?
The MIME type (media type) for JSON-LD (linked data) files with the .jsonld extension is application/ld+json. Used for structured data: Google reads <script type="application/ld+json"> blocks for rich results.
Content-Type header
Content-Type: application/ld+jsonText-based types should include a charset so the browser decodes characters correctly.
Server configuration
| Server | Configuration |
|---|---|
Nginx (mime.types or types {}) | application/ld+json jsonld; |
Apache (.htaccess) | AddType application/ld+json .jsonld |
IIS (web.config) | <mimeMap fileExtension=".jsonld" mimeType="application/ld+json" /> |
| Node.js / Express | res.type('jsonld') or res.setHeader('Content-Type', 'application/ld+json') |
| Amazon S3 | Set Content-Type: application/ld+json on the object (metadata), or pass --content-type application/ld+json to aws s3 cp |
Should .jsonld files be compressed?
Yes. JSON-LD (linked data) is text, so enabling gzip or Brotli for application/ld+json typically saves 50–80 % of the transfer size. Make sure your server’s compression list includes this type — check with the website compression test.
Why the MIME type matters
Browsers decide what to do with a response — render, run, play or download — from the Content-Type header, not the file extension. With X-Content-Type-Options: nosniff, a wrong type causes stylesheets and scripts to be blocked outright. For uploads, never trust the type sent by the client; check the file’s content (its magic bytes) on the server.
Frequently asked questions
What is the MIME type for .jsonld?
application/ld+json.How do I set the Content-Type for .jsonld in Nginx?
application/ld+json jsonld; is listed in the types block (usually in /etc/nginx/mime.types) and reload Nginx.