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[Workers] Update header limits #25873

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Oct 16, 2025
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[Workers] Update header limits #25873

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4 changes: 2 additions & 2 deletions src/content/docs/workers/platform/limits.mdx
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Expand Up @@ -35,7 +35,7 @@ import { Render, WranglerConfig, DashButton } from "~/components";

URLs have a limit of 16 KB.

Request headers observe a total limit of 32 KB, but each header is limited to 16 KB.
Request headers observe a total limit of 128 KB.

Cloudflare has network-wide limits on the request body size. This limit is tied to your Cloudflare account's plan, which is separate from your Workers plan. When the request body size of your `POST`/`PUT`/`PATCH` requests exceed your plan's limit, the request is rejected with a `(413) Request entity too large` error.

Expand All @@ -52,7 +52,7 @@ Cloudflare Enterprise customers may contact their account team or [Cloudflare Su

## Response limits

Response headers observe a total limit of 32 KB, but each header is limited to 16 KB.
Response headers observe a total limit of 128 KB.

Cloudflare does not enforce response limits on response body sizes, but cache limits for [our CDN are observed](/cache/concepts/default-cache-behavior/). Maximum file size is 512 MB for Free, Pro, and Business customers and 5 GB for Enterprise customers.

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