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Screaming Frog SEO Spider is a website crawler for Windows, macOS and Ubuntu used for technical SEO site audits. It audits sites for over 300 SEO issues and can find broken links, audit redirects, analyse page titles and meta data, and generate XML sitemaps. A free version is available.
A service for sharing text, files and redirects through links that are end-to-end encrypted and destroyed after viewing. The encryption key is part of the link and is never sent to the server. An API for text-based secrets requires an active subscription. Free plan available; paid plans billed annually.
SEOMacroscope crawls websites to find broken links, redirects, and technical SEO issues.
SEOnaut is an open source SEO auditing and reporting tool. It crawls websites and checks for broken links, redirects, duplicated or missing meta tags, heading issues, hreflang problems and missing image alt attributes. The tool can be configured to crawl subdomains or sitemaps, follow nofollow links, check external links and access password-protected sites via HTTP Basic Authentication. It can also create WACZ archives of a site.
ServerSearcher is an independent comparison site for cloud, VPS, dedicated, and GPU servers. It aggregates plans, pricing, and locations from multiple hosting providers so users can compare options in one place. ServerSearcher does not sell hosting; choosing a plan redirects to the provider's website to complete the purchase.
The Bézier Game is a game to help users master the pen tool, requiring a keyboard and mouse. It offers tutorial stages, undo, redo, clear, snap to angle and unlink control handles, and reports completed stages with node counts. On touch devices it redirects to The Boolean Game.
TOXNET redirects users to other National Library of Medicine products after a broader NLM reorganization. The page explains access routes for toxicology resources including HSDB, LactMed, ChemIDplus, LiverTox and Haz-Map. It states that PubChem serves as NLM's single source for chemical information starting December 2022 and notes that TOXMAP, CTD and Pillbox were retired.
TreeGenes is a genomics database with a new version powered by Tripal. It provides browsing of genomes with JBrowse, sequence search with DIAMOND, species lookup, and data downloads from an FTP site. Users can submit data to the database, and a map-based web app called CartograPlant is linked. The site lists latest studies and literature, and the page redirects to CartograPlant.
TrueURL is a free online tool that checks where a URL redirects and shows the complete redirect chain with status codes and response times. It also works as a URL unshortener and expander. The site states that checks are done in real time and that no URLs are stored or saved. It analyzes one URL at a time.
UniData is a data archive for the social sciences. The site announces that UniData is joining DASSI, a new project with CNR called Data Archive for Social Sciences in Italy, which continues archiving, management and sharing services for social science data. The page redirects to a new site.
Unshorten.It! is a web service that expands shortened URLs, showing the destination URL, description, safety ratings, screenshots and blacklist checks. Its API is no longer supported and new API key registrations are not accepted; it continues to operate for current users, who are advised to migrate away.
URL Expander expands shortened links and reveals redirect destinations before you open them.
An OSINT tool for investigating usernames online. It presents a custom search form that redirects to search engines and websites of external parties. The page notes that usernames can contain real information and that unique usernames are more likely to indicate the same person across accounts.
A URL redirect checker that follows the path of a URL, shortened link or tiny URL and displays the full redirection path, including php, htaccess, NGINX, JavaScript redirects and meta-refreshes, leading to the final destination. The site describes uses in troubleshooting redirect issues, SEO redirect chains and affiliate link tracking.
Wikimedia Shortener creates short links, custom URLs, or branded redirects for sharing long web addresses.
Wizardstool crawls websites to find broken links, redirects, and technical SEO issues.
