مختبر ملف robots.txt
Not rocket science, but simple and efficient.Just provide your main site URL, and it will get the corresponding live robots.txt file and analyse it for you, and tell you:if any unknown rule foundif any contradiction between the rules foundor unclear rule foundThe big plus: you can do the test by simulating either Googlebot, Bingbot, Yandex, […]
أداة اختبار رؤوس الأمان
Just provide any URL or domain and it will analyse the headers served by the given page. Among many header tested: HTTP Strict-Transport-Security (HSTS), Content-Security-Policy (CSP), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, Cross-Origin-Opener-Policy (COOP), Cross-Origin-Resource-Policy (CORP), Set-Cookie, Access-Control-Allow-Origine …Very complete and useful forSite owners: to check their setup and how their site is viewed by browsers, crawler, bots, so as customer (and […]
مولد خرائط طلبات الموقع
Provide any site or url of a page, and the tool will map all other sites, url, IP or remote services that the page is calling on the front-end, in other words, informing them of your request.As most of the sites may serve you a different content based on your location (different language, but not […]
قاعدة بيانات الكيمياء ChemSpider
109+ million of chemical structures.Free chemical structure database providing fast text and structured search.Search by chemical name, brand, or other parameters, to find literature references, physical properties, spectra, suppliers.
جوجل سكولار
Gives access to online education and research articles.Several languages and automatic translation also.Note: not everything is 100% free, but at least some abstract.
البحث عن أطروحات EThOS UK
Search over the 500k UK theses from over 120 UK institutions: the Electronic Theses Online Service (EThOS), operated by the British Library, is the centralized national repository for UK doctoral theses. It aggregates metadata for over 600,000 PhD records from more than 140 higher education institutions, providing a single point of discovery for research dating […]
البحث في أوراق بحثية أساسية
“The world’s largest collection of open access research papers” we could not describe better.207+ million of them.Sortable by language and other criteria. You’ll get a pdf of the original source, either an abstract or full text.Provides also an API to conduct any automatic search or statistics over any of your topics.
بوابة أبحاث العلوم العالمية
Aggregates 200 international research institutions and permits a centralized search on their research articles and databases. If you must start somewhere, start here!Edit: site is currently down. Vote wisely …An institution by institution filter is provided, so as an automatic translation. Again, a must.Tip: the link above is the advanced search. Go to the home […]
بحث منشورات بروكويست
Search millions of worldwide research publications. Integral or abstract view, up to the last 10 years, from 9000+ publishers.Free search for a couple of publications, free account for more.
مفردات الهندسة الكهربائية
Maintained by the International Electrotechnical Commission (aka IEC), Electropedia provides all the terms and definitions used for the electricity and electronic fields, in 11 languages, used in international standards.Electropedia, maintained by the International Electrotechnical Commission (IEC), is the definitive online database for electrotechnical terminology, formally known as the International Electrotechnical Vocabulary (IEV). It provides a […]