What is MicrosoftPreview?
MicrosoftPreview is a web crawler that generates page snapshots and link previews for Microsoft products and services, extracting metadata and visual content to create rich previews in applications. Agent Analytics can track when it visits your website.
Overview
| Operated By | Microsoft |
| 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
MicrosoftPreview usually makes a single request within seconds of a URL being shared, without crawling further. Traffic rises and falls with sharing activity, so a widely circulated link can produce a sharp burst of fetches.
MicrosoftPreview's User Agent
| User Agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; MicrosoftPreview/2.0; +https://aka.ms/MicrosoftPreview) Chrome/100.0.4896.127 Safari/537.36 |
How To Block MicrosoftPreview With Robots.txt
Add this rule to your robots.txt file to request that MicrosoftPreview not access your website, or use Automatic Robots.txt to request the same of all fetchers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: MicrosoftPreview # https://knownagents.com/agents/microsoftpreview
Disallow: /Global Statistics for MicrosoftPreview
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
1% of top websites block MicrosoftPreview in their robots.txt files.
Overall Fetcher Traffic
2.6% of all web traffic came from fetchers.
Frequently Asked Questions
Should I Block MicrosoftPreview?
Usually not. Blocking MicrosoftPreview may leave shared links without a title or image, making them less inviting to click. If it begins fetching at unexpected volume, try rate limiting before blocking it outright. For context, 1% of the top websites we track currently have robots.txt rules for MicrosoftPreview.
Does MicrosoftPreview Follow Robots.txt Rules?
No. MicrosoftPreview 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 MicrosoftPreview Access Private Content?
No. MicrosoftPreview has no credentials and should access only the public URL and assets needed for a preview. It does not continue through the rest of your site.
Why Is MicrosoftPreview Visiting My Website?
Someone shared a link to your page. MicrosoftPreview fetched it to build a preview card, and each new share may trigger another request. A spike often means your content is circulating more widely.
How Can I Tell if MicrosoftPreview Is Visiting My Website?
Agent Analytics tracks MicrosoftPreview visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user-agent string contains "MicrosoftPreview". Look for a page and its preview assets being requested without follow-up navigation. Because MicrosoftPreview does not publish a verification method, any client can claim its identity and a log match is only a clue.