Is your browser up to date?

A quick check of the browser you're using right now and its operating system, against the newest releases and the security fixes we track. Nothing is saved or sent anywhere: it's read fresh and shown only to you.

Your browser

Browser not recognised Not recognised

Chrome and Edge share their exact version; Firefox and Safari show theirs in the User-Agent

Your operating system

Not known Not known

a browser can't tell more

How to update Windows (Microsoft) ↗

Newest releases, checked daily from Google, Microsoft and Mozilla: Chrome 157.0.8103.27, Edge 156.0.4314.58, Firefox 159.0 (as of Nov 1, 5:50am, Arizona time). A browser can't show its installed software or the operating system's own patch level. For those, Patch Sanity's Inventory has a Sanity Check (a one-time script: nothing installed, nothing saved unless you say so) and, coming soon, an agent that keeps watch.

This device · what any website can see about the machine you're on, without asking

Read fresh each time and shown only to you: nothing here is saved.

Sent with every page

IP address216.73.216.238IPv4

Its DNS namenot sentfrom the address's reverse DNS

ConnectionHTTP/2.0 · HTTPShow the browser reached us

Browser says (User-Agent)Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)browsers blur the OS version in this on purpose

Browser brands (client hints)not sentmajor versions only: Chrome and Edge send these

Platform (client hints)not sent

Languagesnot sentin the browser's order of preference

Compressiongzip, br, zstd, deflate

Privacy signalsnone sent

Read by the page, in your browser

Reading…needs JavaScript

Browser Check is part of Patch Sanity, by Mass Insanity Productions, LLC: provided as-is, for information only (disclaimer, privacy).