The Cloudflare Blog

ecdysis is a Rust library enabling zero-downtime upgrades for network services. After five years protecting millions of connections at Cloudflare, it’s now open source.

The way content is discovered online is shifting, from traditional search engines to AI agents that need structured data from a Web built for humans. It’s time to consider not just human visitors, but start to treat agents as first-class citizens. Markdown for Agents automatically converts any HTML page requested from our network to markdown.

The number of DDoS attacks more than doubled in 2025. The network layer is under particular threat as hyper-volumetric attacks grew 700%.

Local Uploads on R2 reduces request duration for uploads by up to 75%. It writes object data to a nearby location and asynchronously copies it to your bucket, all while data is available immediately.

Google's dual-purpose crawler creates an unfair AI advantage. To protect publishers and foster competition, the UK’s Competition and Markets Authority must mandate crawler separation for search and AI.

Deploy multiple Workers under a single domain with the ability to make them feel like single-page applications. We take a look at how service bindings enable URL path routing to multiple projects.

Moltworker is a middleware Worker and adapted scripts that allows running OpenClaw (formerly Moltbot, formerly Clawdbot) on Cloudflare's Sandbox SDK and our Developer Platform APIs. So you can self-host an AI personal assistant — without any new hardware.

As a proof of concept, we built a Matrix homeserver to Cloudflare Workers — delivering encrypted messaging at the edge with automatic post-quantum cryptography.

The last quarter of 2025 brought several notable disruptions to Internet connectivity. Cloudflare Radar data reveals the impact of cable cuts, power outages, extreme weather, technical problems, and more.

An automated routing policy configuration error caused us to leak some Border Gateway Protocol prefixes unintentionally from a router at our Miami data center. We discuss the impact and the changes we are implementing as a result.

A vulnerability was recently identified in Cloudflare’s automation of certificate validation. Here we explain the vulnerability and outline the steps we’ve taken to mitigate it.

The Astro Technology Company team — the creators of the Astro web framework — is joining Cloudflare. We’re doubling down on making Astro the best framework for content-driven websites, today and in the years to come.

Cloudflare acquires Human Native, an AI data marketplace specialising in transforming content into searchable and useful data, to accelerate work building new economic models for the Internet.

A recent change to 1.1.1.1 accidentally altered the order of CNAME records in DNS responses, breaking resolution for some clients. This post explores the technical root cause, examines the source code of affected resolvers, and dives into the inherent ambiguities of the DNS RFCs.

Cloudflare Radar data shows Internet traffic from Iran has effectively dropped to zero since January 8, signaling a complete shutdown in the country and disconnection from the global Internet.

There has been speculation about the cause of a BGP anomaly observed in Venezuela on January 2. We take a look at BGP route leaks, and dive into what the data suggests caused the anomaly in question.

Physical data center maintenance is risky on a global network. We built a maintenance scheduler on Workers to safely plan disruptive operations, while solving scaling challenges by viewing the state of our infrastructure through a graph interface on top of multiple data sources and metrics pipelines.

We have declared “Code Orange: Fail Small” to focus everyone at Cloudflare on a set of high-priority workstreams with one simple goal: ensure that the cause of our last two global outages never happens again.

Cloudflare's H1 2025 Transparency Report is here. We discuss our principles on content blocking and our innovative approach to combating unauthorized streaming and copyright abuse.

Cloudflare’s R2 SQL, a distributed query engine, now supports aggregations. Explore how we built distributed GROUP BY execution, using scatter-gather and shuffling strategies to run analytics directly over your R2 Data Catalog.