Default Cache Behavior

Cloudflare respects the origin web server’s cache headers in the following order unless an Edge Cache TTL cache rule overrides the headers.

• Cloudflare does not cache the resource when:
  • The Cache-Control header is set to private, no-store, no-cache, or max-age=0.
  • The Set-Cookie header exists.
• Cloudflare does cache the resource when:
  • The Cache-Control header is set to public and max-age is greater than 0.
  • The Expires header is set to a future date.

When enabled Origin Cache Control on an Enterprise customer’s website, it indicates that Cloudflare should strictly respect Cache-Control directives received from the origin server. Free, Pro and Business customers have this feature enabled by default. For a list of directives and behaviors when Origin Cache-Control is enabled or disabled, refer to Cache-Control directives.

​​ Default cached file extensions

Cloudflare only caches based on file extension and not by MIME type. The Cloudflare CDN does not cache HTML by default. Additionally, Cloudflare caches a website’s robots.txt.

To cache additional content, refer to Cache Rules to create a rule to cache everything.

​​ Customization options and limits

Cloudflare’s CDN provides several cache customization options:

• Caching behavior for individual URLs via Cache Rules
• Customize caching with Cloudflare Workers
• Adjust caching level, cache TTL, and more via the Cloudflare Caching app

​​ Upload limits

If you require a larger upload, group requests smaller than the upload thresholds or upload the full resource through an unproxied (grey-clouded) DNS record.

​​ Cacheable size limits

Cloudflare cacheable file limits:

• Free, Pro and Business customers have a limit of 512 MB.
• For Enterprise customers the default maximum cacheable file size is 5 GB. Contact your account team to request a limit increase.