---
title: Workers WebSocket message size limit increased from 1 MiB to 32 MiB · Changelog
description: The maximum WebSocket message size limit for all Workers has been
  increased from 1 MiB to 32 MiB.
chatbotDeprioritize: true
source_url:
  html: https://developers.cloudflare.com/changelog/2025-10-31-increased-websocket-message-size-limit/
  md: https://developers.cloudflare.com/changelog/2025-10-31-increased-websocket-message-size-limit/index.md
---

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## Workers WebSocket message size limit increased from 1 MiB to 32 MiB

Oct 31, 2025

[Workers ](https://developers.cloudflare.com/workers/)[Durable Objects ](https://developers.cloudflare.com/durable-objects/)[Browser Rendering](https://developers.cloudflare.com/browser-rendering/)

Workers, including those using [Durable Objects](https://developers.cloudflare.com/durable-objects/) and [Browser Rendering](https://developers.cloudflare.com/browser-rendering/workers-bindings/), may now process WebSocket messages up to 32 MiB in size. Previously, this limit was 1 MiB.

This change allows Workers to handle use cases requiring large message sizes, such as processing Chrome Devtools Protocol messages.

For more information, please see the [Durable Objects startup limits](https://developers.cloudflare.com/durable-objects/platform/limits/#SQLite-backed-Durable-Objects-general-limits).
