github.com
gtm-engineer-skills helps track or improve visibility in AI search, answer engines, and generative results.
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gtmetrix.com
GTmetrix checks page speed, performance, technical issues, and web quality signals.
github.com
HEAD helps manage meta tags, Open Graph data, and social sharing previews for websites.
search.google.com
Lighthouse Rich Result Checker helps create or test structured data, schema markup, and rich-result eligibility.
github.com
lighthouse-check-action checks page speed, performance, technical issues, and web quality signals.
linkok.com
linkok.com is a broken link checker that scans a website periodically and emails a report summary with a link to the full report. It retries after temporary errors to reduce false positives. A free plan covers a website with up to 100 pages on monthly scans.
littlelink.io
LittleLink is an open source, do-it-yourself alternative to Linktree for creating link-in-bio pages. It includes over 100 branded button options, supports light, dark, and automatic themes, and follows best practices for SEO, accessibility, and performance, with no required frameworks or JavaScript.
newznab.com
Newznab is a Usenet indexing web application with community features. It groups messages for user-friendly access and uses the Sphinx Open Search Server for searching Usenet articles. It includes SEO-friendly URL rewriting and simple CMS features for adding content pages. Documentation and support are provided with the plus version; the free version includes basic install resources in a README file.
ogimg.xyz
ogimg.xyz helps manage meta tags, Open Graph data, and social sharing previews for websites.
tools.pingdom.com
Pingdom's free Website Speed Test analyzes a webpage's load time and identifies bottlenecks. A full page test breaks requests into stages such as DNS lookup, SSL handshake, connect, send, wait, receive and blocked, and flags redirects and 4xx or 5xx responses. Pingdom also offers uptime and performance monitoring from more than 70 global polling locations.
respona.com
Respona is a link building service that places brand mentions on publisher sites and an affiliate recruitment platform for finding affiliate partners and automating outreach. Placements are ordered as done-for-you and priced per placement.
github.com
A PHP package providing a fluent builder for all Schema.org types and their properties. Its classes are generated from Schema.org's JSON-LD standards file, and types can be converted to arrays, rendered to scripts, or encoded as JSON. Installation is via composer.
github.com
ShotOG helps manage meta tags, Open Graph data, and social sharing previews for websites.
specification.website
A platform-agnostic specification of the technical features a good website should have, built in the open under an MIT licence. It covers 177 topics across ten areas, including foundations, SEO, accessibility, security, performance and privacy, and offers a yes/no checklist for auditing a site. An open, read-only MCP server lets agents query the specification.
wheregoes.com
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.
en.search.wordpress.com
WordPress.com search page for finding public posts, blogs, and topics across WordPress sites.
scan.worldland.foundation
WorldLand Seoul Explorer is a BlockScout-based block explorer for the WorldLand network that provides analytics data, an API, and smart contract tools. It displays blocks, transactions, a gas tracker and wallet addresses. The API supports modules for accounts, logs, tokens, stats, blocks, contracts and transactions, and an ETH RPC API supports selected methods in the format specified for Ethereum nodes.
xml-sitemaps.com
XML-Sitemaps.com is a free online service that generates an XML sitemap for a website, which can be submitted to Google, Bing and other search engines. No registration is required; users enter a website link and get a sitemap for up to 500 pages, then download the sitemap files. It also prepares an HTML site map and a text sitemap.