
We’ve devised novel methods to detect multi-user IP addresses, and today we’re excited to announce their integration into our global threat intelligence products. These will improve the quality of our detection techniques and reduce false positives for our customers, and the clients that visit them.

Game Off is an annual game jam (or “hackathon for building games”) that’s a little different from most—it lasts for the entire month of November—not just a weekend or a…

Cloudflare helps build a better Internet through collaboration on open and interoperable standards. This post will describe how Cloudflare contributes to the standardization process to enable incremental innovation and drive long-term architectural change.
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Jonathan Hoyland, Christopher·October 13, 2021Engineering 

Cloudflare worked with TU Graz to study the impact of Spectre on Cloudflare Workers and to develop new defenses against it. Today we're publishing a paper about our research.

As part of our ongoing commitment to ensure GitHub’s conferences are accessible and inclusive to people from all walks of life, we’re offering 30-minute, 1:1 micro-mentoring sessions with GitHub employees.


Announcing a new landing page where you can learn more about our research and additional resources.

Over the summer of 2020 I interned at Cloudflare Research. This invaluable experience contributed to Cloudflare’s support of ODoH protocol, and I was awarded the best student paper award at PETS 2021.

As part of Cloudflare’s effort to build collaborations with academia, we host research focused internships all year long. Interns collaborate cross-functionally in research projects and are encouraged to ship code and write a blog post and a peer-reviewed publication at the end of their internship.

The README for Cash is straightforward:

Why would a company promote a native app over their perfectly usable website?

What Cloudflare Research has been up to for the last two years.

We used Cloudflare Radar to find out those countries on the planet that have more (and less) mobile traffic on the Internet. Africa and the Middle East are the areas of the planet where mobile traffic dominates the Internet experience

I saw this blog post the other day: 58% of Hacker News, Reddit and tech-savvy audiences block Google Analytics. That's an enticing title to me. I've had

A good essay from Jean Yang.

I like the pushback from Katie Kodes here. I've said in the past that I don't think server-side languages haven't quite nailed "building in components" as

The Northern Hemisphere has hit fall, and the southern is starting to warm into summer. September has been a busy time for our community. Maintainers have been getting their repositories…

Creating an interactive experience with fiction can be a chore with traditional content management tools. Let’s make it the domain of just one content creator in which the user will fill out a form before reading the story. In this article, Bryan Robinson will be building an interactive fiction experience in which a user can insert words that match parts of speech given by the content creator. Let

In Mon Cheri Bridals, LLC v. Cloudflare, Inc., the United States District Court for the Northern District of California granted Cloudflare’s motion for summary judgment and concluded that no reasonable jury could find Cloudflare liable for the alleged copyright infringement at issue.

Giving back to open source projects is a great way to practice skills you don’t get to use in your day job. Check out ways to get involved!

Shopify optimization expert Meinolf Sellmann collaborated with his former colleagues to win the AI4TSP Competition that focuses on solutions to the Travelling Salesperson Problem.

Contemporary x86 processors implement some variants of Hyper-Threading and Turbo Boost. We decided to learn about the implications of these two technologies.

In this article I'm going to talk about branching strategies and different types of Git branches. I’m also going to introduce you to two common branching workflows: Git Flow and GitHub Flow.

If you think about it, 13kB isn’t really a lot. The image above is 81kB. This page weighs over 3MB (waaay more if you include the videos). That’s why it’s…


Dave and I slapped up a little videos section of the ShopTalk website. Twelve so far! They are short-ish, between 10-20 minutes, each focused on one fairly

GitHub Releases has a new look and updated tools to make it easier for open source communities to create and share high-quality releases with auto-generated release notes.


How do we get so much stuff out so quickly? That we are able to innovate — and innovate so quickly — is no happy accident. In fact, this capability has been very deliberately built into the DNA of Cloudflare.

All my zines are now available in print!

In this blog we start to explain Web3 in the context of the web's evolution, and how Cloudflare might help to support it.

Learn how to build Web3 applications with Cloudflare’s new open-source template.

Directives are one of GraphQL’s best — and most unspoken — features.



Carmela, Dev Degree student, shares how she learned to appreciate the stages of learning, dispel the myth of the “real developer”, combat imposter syndrome by asking for help, and the power of valuing representation.

TL;DR Remember what life was like before smartphones? Remember manually having to sync your computer’s playlists with your iPod every time you added a few songs? One of Spotify’s core products, our mobile app, was designed specifically to leave all of that busywork in the past, changing how we travel with our music forever.

You can now use Cloudflare to do serverless end-to-end live-streaming. Stream Live offers video ingestion, encoding, recording and a player in a single product.

Cloudflare Radar shows how Spanish media outlets had an increase in Internet traffic after the volcano eruption on the island of La Palma.

Get your desktop ready for fall and the upcoming Halloween season with a fresh batch of desktop wallpapers. Created with love by designers and artists from across the globe, they come in versions with and without a calendar for October 2021.

I rewrote kentcdodds.com using the latest technologies and I want to talk about what I did.


In this article, we’ll highlight how modern image formats (AVIF or WebP) can improve compression by up to 50% and deliver better quality per-byte while still looking visually appealing. We’ll compare what’s possible at high-quality, low-quality and file-size targets.

We’re excited to announce that all customers now have the ability to register new domains with Cloudflare.

In 2020, we decided to formalize our commitment to being an active partner in the global community by joining the UN Global Compact (UNGC) as a signatory.

You can now easily and quickly create email addresses for domain, and forward to them all to your preferred inbox, like Gmail or Outlook. Cloudflare Email Forwarding is completely free, and always res

As part of GitHub’s strong commitment to developer privacy, we are excited to announce updates to our privacy agreements in line with new legal requirements and our own robust data protection practices.

This week we celebrate Cloudflare's birthday. We launched the company 11 years ago tomorrow: September 27, 2010. It has been our tradition, since our first birthday, to use this week to launch innovative new products that we think of as our gift back to the Internet.
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Matthew Prince, Michelle Zatlyn·September 26, 2021Engineering 
Big thoughts on where the industry is headed from Shawn Wang:

New tool: an nginx playground

Whatever Google wants it to be. I always thought it was exactly what your <title> element was. Perhaps in lieu of that, what the first <h1> on the

If you’ve recently started working with GraphQL, or reviewed its pros and cons, you’ve no doubt heard things like “GraphQL doesn’t support caching” or


The web's premier conference is online this fall, October 11–13, 2021: An Event Apart Fall Summit. If you already know how good of a conference this is (i.e.

The last 18 months have been a time of unprecedented turbulence. As the people of the world have flooded online, businesses have joined them, using web development tools to adapt in real-time. Several years ago there seemed to be a gulf between drag-and-drop tools and full-blown web development. Today, it’s heartening to see the likes of Wix adding more code-heavy options to their repertoire.

Teaching by filling in knowledge gaps


In the right circumstances, your web analytics or real user measurement data can offer visibility into the world of imposter domains, used by web scrapers to re-publish your site content on their servers. Content scraping is a fact of life on the Internet. When you think of web scraping, you probably do not think about the scrapers turning around and immediately serving your entire, whole page con

This is the culmination of a special project we’ve been working on for the last few months dubbed Project Myriagon, a reference to the 10,000-sided polygon of the same name.