Engineering Insights

Cloudflare One Client - WARP client for Windows (version 2025.9.173.1)

A new Beta release for the Windows WARP client is now available on the beta releases downloads page. This release contains minor fixes, improvements, and new features including Path Maximum Transmission Unit Discovery (PMTUD). With PMTUD enabled, the client will dynamically adjust packet sizing to optimize connection performance. There is also a new connection status message in the GUI to inform users that the local network connection may be unstable. This will make it easier to debug connectivi

Cloudflare One Client - WARP client for macOS (version 2025.9.173.1)

A new Beta release for the macOS WARP client is now available on the beta releases downloads page. This release contains minor fixes, improvements, and new features including Path Maximum Transmission Unit Discovery (PMTUD). With PMTUD enabled, the client will dynamically adjust packet sizing to optimize connection performance. There is also a new connection status message in the GUI to inform users that the local network connection may be unstable. This will make it easier to debug connectivity

Braintrust joins the Vercel Marketplace

is now available on the Vercel Marketplace, bringing AI evaluation and observability directly into the Vercel workflow.Braintrust With this new integration, developers can automatically stream and evaluation data from Vercel to Braintrust with just a few clicks, gaining full visibility into model quality and user experience in real time.traces With on Vercel Marketplace, you can:Braintrust to deploy the example today, with easy setup and unified billing.Explore the template Read more Ship ag

Durable Objects, Workers - View and edit Durable Object data in UI with Data Studio (Beta)

You can now view and write to each Durable Object's storage using a UI editor on the Cloudflare dashboard. Only Durable Objects using SQLite storage can use Data Studio. Go to Durable Objects Data Studio unlocks easier data access with Durable Objects for prototyping application data models to debugging production storage usage. Before, querying your Durable Objects data required deploying a Worker. To access a Durable Object, you can provide an object's unique name or ID generated by Cloudf

Cloudflare Fundamentals - Increased HTTP header size limit to 128 KB

CDN now supports 128 KB request and response headers 🚀 We're excited to announce a significant increase in the maximum header size supported by Cloudflare's Content Delivery Network (CDN). Cloudflare now supports up to 128 KB for both request and response headers. Previously, customers were limited to a total of 32 KB for request or response headers, with a maximum of 16 KB per individual header. Larger headers could cause requests to fail with HTTP 413 (Request Header Fields Too Large) errors.

Load Balancing - Monitor Groups for Advanced Health Checking With Load Balancing

Cloudflare Load Balancing now supports Monitor Groups, a powerful new way to combine multiple health monitors into a single, logical group. This allows you to create sophisticated health checks that more accurately reflect the true availability of your applications by assessing multiple services at once. With Monitor Groups, you can ensure that all critical components of an application are healthy before sending traffic to an origin pool, enabling smarter failover decisions and greater resilienc

Google Cloud C4 Brings a 70% TCO improvement on GPT OSS with Intel and Hugging Face

React Conf 2025 Recap

Last week we hosted React Conf 2025, in this post, we summarize the talks and announcements from the event...