robots.txt テスター
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, DuckDuckBot, Baiduspider, Slurp, Sogou, Exabot, ia_archiver, AhrefsBot, MJ12bot, SemrushBot, SEOkicks-Robot, BLEXBot, DotBot, rogerbot, SeznamBot, Screaming Frog, SiteCheckerBot, Wotbox and UptimeRobot
セキュリティヘッダーテスター
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 their related trust). A must for big brands and commercial sites.Visitors or shoppers: wanting to know your policy and risk of browsing your site. A must if you already have some doubts (but in general, for safety or security, you know the saying “if you already have a doubt …”).Not only a very good tool, […]
サイトリクエストマップジェネレーター
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 only), this service permits to chose a huge list of various request locations around the world to make the test.Additionally to the graph of the requests, it tries to classify the nature of each remote request, such asCDNanalyticsadvertisement services…Note: this free service is impacted by its success; while the queue is treated relatively fast, you […]
ChemSpider化学データベース
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.
Google Scholar
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.
EThOS UK 論文検索
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 back to the 1700s.Update from the editor: EThOS was badly damaged by the cyber-attack. Work is underway to restore an interim platform in early 2026. There is no need to update existing links to EThOS records as they will resolve to the relevant thesis on the new platform. We will continue to update the database […]
CORE研究論文検索
“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.
ワールドワイドサイエンス研究ゲートウェイ
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 page to get the simplified search.
ProQuest出版物検索
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.
電気学百科事典 電気技術用語集
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 structured repository of over 20,000 terms and definitions standardized to ensure international consistency across electrical, electronic, and related technologies.To be used for:Standardize nomenclature in technical manuals and safety protocols to eliminate ambiguity in high-risk environments.Ensure component interoperability by adhering to IEC-defined parameters and units in procurement specifications.Validate terminology in patent filings and regulatory submissions to […]