---
title: Workers WebSocket message size limit increased from 1 MiB to 32 MiB
description: The maximum WebSocket message size limit for all Workers has been increased from 1 MiB to 32 MiB.
image: https://developers.cloudflare.com/changelog-preview.png
---

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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 Run ](https://developers.cloudflare.com/browser-run/) 

Workers, including those using [Durable Objects](https://developers.cloudflare.com/durable-objects/) and [Browser Rendering](https://developers.cloudflare.com/browser-run/), 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).

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