HTTP Observatory is described as 'Developed by Mozilla, the HTTP Observatory performs an in-depth assessment of a site’s HTTP headers and other key security configurations' and is a Website Audit tool in the security & privacy category. There are more than 10 alternatives to HTTP Observatory for a variety of platforms, including Web-based, Self-Hosted, Google Chrome, SaaS and Linux apps. The best HTTP Observatory alternative is Web Check, which is both free and Open Source. Other great apps like HTTP Observatory are SiteOne Crawler, SpiderFoot, Google Lighthouse and OSINT-tool.
Get an insight into the inner-workings of a given website: uncover potential attack vectors, analyse server architecture, view security configurations, and learn what technologies a site is using.
Web Check is the most popular Web-based & Self-Hosted alternative to HTTP Observatory.
Web Check is the most popular Open Source & free alternative to HTTP Observatory.
A free in-depth website analyzer providing audits of security, performance, SEO, accessibility and other technical aspects. Available as a desktop application for Windows/macOS/Linux and as a CLI tool for advanced users and CI/CD processes. It also includes an offline web page exporter.
SiteOne Crawler is the most popular Windows, Mac & Linux alternative to HTTP Observatory.
SpiderFoot automates OSINT to find everything possible about your target. It integrates with just about every data source available and utilises a range of methods for data analysis, making that data easy to navigate.
Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO and more.
OSINT tool is a browser extension and web application built for researchers, investigators, journalists and intelligence analysts. Our extension gives you access to a suite of OSINT utilities directly on any webpage you visit.
OSINT-tool is the most popular commercial alternative to HTTP Observatory.
urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.
Explore the complete technology stack behind websites, offering insights into frameworks, services, and server software for competitive analysis, tech market insight, and marketing strategies.
Who is peeking over your shoulder while you work, watch videos, learn, explore, and shop on the internet? Enter the address of any website, and Blacklight will scan it and reveal the specific user-tracking technologies on the site—and who’s getting your data.
Run a free website speed test from around the globe using real browsers at consumer connection speeds with detailed optimization recommendations.
PageSpeed Insights (PSI) reports on the performance of a page on both mobile and desktop devices, and provides suggestions on how that page may be improved.
REDbot is lint for HTTP resources. it tests protocol correctness, cacheability, content negotiation and more.
This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet. Please note that the information you submit here is used only to provide you the service. We don't use the domain names or the test results, and we never will.
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