What is Cloudflare Browser Rendering?
Cloudflare Browser Rendering is a serverless browser automation service that runs on Cloudflare Workers. It enables AI agents and applications to control a headless browser directly from the edge, allowing them to navigate websites, interact with dynamic content, and extract data at scale without managing browser infrastructure. Agent Analytics can track when it visits your website.
Overview
| Operated By | Cloudflare |
| Source | Official Website |
| Expected To Follow Robots.txt | No |
| Insights Last Updated | August 11, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
Cloudflare Browser Rendering is generic automation, so its traffic pattern depends entirely on the script or AI behind it. Human-guided runs tend to resemble short, deliberate sessions, while autonomous runs can look like a browser that never tires. Request timing and paths reveal more about its behavior than its name.
Cloudflare Browser Rendering's User Agent
| User Agent | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 |
How To Block Cloudflare Browser Rendering With Robots.txt
Add this rule to your robots.txt file to request that Cloudflare Browser Rendering not access your website, or use Automatic Robots.txt to request the same of all automated agents at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Cloudflare Browser Rendering # https://knownagents.com/agents/cloudflare-browser-rendering
Disallow: /Global Statistics for Cloudflare Browser Rendering
As of August 11, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
0% of top websites block Cloudflare Browser Rendering in their robots.txt files.
Overall Automated Agent Traffic
0.1% of all web traffic came from automated agents.
Top Visited Website Categories
The types of websites most frequently visited by Cloudflare Browser Rendering.
Frequently Asked Questions
Should I Block Cloudflare Browser Rendering?
Judge it by its behavior. This category ranges from harmless testing tools to abusive automation, and Cloudflare Browser Rendering's purpose depends on whoever runs it. Block it if it targets login pages, submits forms, or crawls faster than a person reasonably could. Almost none of the top websites we track currently have robots.txt rules for Cloudflare Browser Rendering.
Does Cloudflare Browser Rendering Follow Robots.txt Rules?
No. Cloudflare Browser Rendering is not expected to follow robots.txt directives, so a disallow rule only communicates your preference. Enforce the block with firewall or server rules, then use Agent Analytics to verify that its requests stop.
Does Cloudflare Browser Rendering Access Private Content?
It can access whatever its configuration allows. If someone gives Cloudflare Browser Rendering credentials, it can reach anything available to that account. Without them, it is limited to public pages.
Why Is Cloudflare Browser Rendering Visiting My Website?
Someone automated a task that involves your site. Cloudflare Browser Rendering may be running tests, collecting data, or following an AI system's instructions. Its visit pattern reveals more about its purpose than its user-agent string does.
How Can I Tell if Cloudflare Browser Rendering Is Visiting My Website?
Agent Analytics tracks visits from Cloudflare Browser Rendering and every other known AI agent, crawler, and scraper, then authenticates each visit using Cloudflare Browser Rendering's published verification method. You can also check your server logs for requests whose user-agent string contains "Cloudflare Browser Rendering". Look for consistent timing or repeated navigation patterns unlikely to come from a person. A matching log entry alone is not proof because any bot can claim to be Cloudflare Browser Rendering.