My SEO Toolkit: Extensions, People & Resources I Use

On-Page SEO & SERP Analysis

• SEOquake · by Semrush (Seoquake) ChromeFirefoxKey SEO metrics for any page, plus an audit and a stack of other tools.
• SEO Pro Extension · by Marketing Syrup ChromeReal-time on-page SEO info — a SEOquake alternative.
• SEO Checker · by Akash Mansukhani ChromeLightweight helper for on-page SEO, page speed and security checks.
• SEOInfo · by Weeblr FirefoxSurface SEO issues as you browse — performance, redirects, structured data and errors. Export to Excel.
• Keywords Everywhere — Keyword Tool · by Axeman Tech ChromeFirefoxFreemium SERP helper — search volume, CPC and competition data across 15+ sites (Google, YouTube, Amazon, GSC and more).
• SEO Search Simulator by Nightwatch · by Nightwatch ChromeSimulate a search from another country and language.
• Shumway SEO ToolkitALL-IN-ONE · by Brian Shumway ChromeFirefoxFast, private on-page SEO data, exports, schema, links, images and SERP previews for working SEOs.Can replace ~10 single-purpose tools on this page — SEO Pro, SEO Checker, SEO Schema Visualizer, OpenLink Sniffer, Link Revealer, NoFollow, Quick/Fire Source Viewer, AI Eyes & the SERP-preview tools. (One dev, so it's a single point of dependency — that's why the standalones stay listed.)
• AMP Validator · by Google ChromeValidate AMP pages and pinpoint errors that GSC doesn't surface.

Rendering & JavaScript SEO

• View Rendered Source · by Peg Leg ChromeSee how the browser turned the original HTML into a working DOM — including everything JavaScript changed.
• SEO Render Insight Tool · by Amin Foroutan ChromeSpot client-side-rendered content. Visualize CSR vs SSR with highlights and charts, and disable JS to test indexability.
• Rendering Difference Engine · by The Gray Dot Company ChromeSee which SEO signals JavaScript adds, removes or alters in the HTML — without reading the code.
• Quick source viewer · by Tomi Mickelsson ChromeView the current page's HTML, JS and CSS fast.
• Fire Source Viewer · by Francesco De Stefano FirefoxQuickly view a page's HTML, JavaScript and CSS.

AI & LLM Visibility

• AI Eyes · by Sam Penny ChromeToggle JavaScript on/off in one click to see a page the way AI models do — stripped of dynamic, interactive content.
• AI Content Visibility Checker (by Adobe LLM Optimizer) · by Adobe ChromeOne-click check of what LLMs can and can't actually read on any page.
• ChatGPT Path by Ayima · by Ayima ChromeExtract insights from your ChatGPT conversations — queries, thoughts, products and sources.

Links, Redirects & Hreflang

• Link Redirect Tracer · by LinkResearchTools GmbH ChromeFirefoxAll-in-one redirect path analyzer — also reads HTTP headers, rel-canonicals, robots.txt, link power and link trust.
• Link Revealer · by Leo Compson ChromeShow any link's full URL on hover, colour-coded for safety.
• NoFollow · by Igor Jerosimić FirefoxQuickly flag nofollow links on a page.
• Hreflang Checker · by Digital Darts ChromeCheck hreflang tags on a page — confirm language code, region code and return links all match.

Structured Data & Schema

• Schema Builder for Structured Data · by Schema App ChromeBuild validated schema markup for any page.
• SEO Schema Visualizer · by Shtros ChromeVisualize JSON-LD schema markup at the click of a button.
• OpenLink Structured Data Sniffer · by OpenLink Software Inc FirefoxReveal structured metadata embedded in HTML — POSH, Microdata, JSON-LD, RDF-Turtle, RDFa.

Sitemaps & XML

• Universal Sitemap Checker · by Warren Hance ChromeCheck status codes and canonical URLs for every URL in an XML sitemap.
• Sitemap Clusterizer · by Shtros ChromeSmarter XML sitemap analysis to streamline the workflow.
• XML Tree · by Alan Stroop ChromeDisplay XML data in a readable layout.
• Pretty XML · by Emile Fugulin FirefoxExcellent for reading XML sitemaps in Firefox.

Performance & Core Web Vitals

• Lighthouse · by Google ChromeOpen-source, automated auditing for performance, quality and correctness.
• SpeedVitals · by SpeedVitals ChromeFirefoxPerformance measurement using Lighthouse for lab data and Chrome's CrUX API for field data.
• Core Web Vitals history · by RUMvision ChromePull Core Web Vitals for any site going back up to 6 months.

Search Console & Analytics

• GSC Guardian · by Node & Link ChromeTrack and analyze Google core updates in real time so changes don't blindside you.
• Google Search Console Date Selector · by Thijs van Hal ChromeCompare periods in GSC and auto-generate the percentage changes.
• Agital — GSC Calculations · by Agital ChromeCalculate and display % change for clicks, impressions, CTR and position in GSC.
• Search Analytics for Sheets · by Mihai Aperghis ChromePull GSC data and auto-back it up straight into Google Sheets.

Archives & Cache

• Web Archives · by Armin Sebastian ChromeFirefoxView archived/cached versions across 10+ engines — Wayback, Archive.is, Google, Bing, Yandex.
• Web Cache Viewer · by Matthew Mallard ChromeCheck the cached version of any page.

Scraping & Data Extraction

• Scrape Similar · by Digitall Studio ChromeTurn any page into structured data in a few clicks.
• Search by Image on Google · by Armin Sebastian FirefoxPowerful reverse image search across Google, Bing, Yandex, Baidu and TinEye.

Privacy & Security

• Bitwarden — Free Password Manager · by Bitwarden ChromeMy LastPass replacement. Open-source password manager that actually respects privacy.
• uBlock Origin · by Raymond Hill FirefoxThe efficient, wide-spectrum content blocker. Easy on CPU and memory.
• Privacy Badger · by EFF Technologists FirefoxAutomatically learns to block invisible trackers.
• YesScript2 · by Andras Horvath FirefoxMark the active tab's domain untrusted and block its scripts — for sites eating resources or misbehaving, even if it breaks the page.
• Buster: Captcha Solver for Humans · by Armin Sebastian FirefoxAsk Buster to solve captchas for you.

Tabs, Sessions & Bookmarks

• OneTab · by OneTab Team ChromeFirefoxToo many tabs? Collapse them to a list and reclaim browser memory.
• Auto Tab Discard · by tlintspr FirefoxSpeed the browser up and cut memory load when you've got a wall of tabs open.
• Tab Session Manager · by sienori ChromeFirefoxSave and restore window/tab state, with automatic saving.
• Save Tab Groups for Tab Session Manager · by Sienori ChromeCompanion to Tab Session Manager for saving tabs by group.
• Simple Tab Groups · by Drive4ik FirefoxTab grouping (heads-up: can conflict with Tab Session Manager).
• Group Speed Dial · by Juraj Mäsiar ChromeFirefoxAccess favorite pages anytime in an organized grid.
• EverSync — Sync bookmarks, backup favorites · by ApptitudeGlobal ChromeFirefoxSync bookmarks across platforms.
• floccus bookmarks sync · by Marcel Klehr FirefoxEverSync complement — sync bookmarks across browsers via Nextcloud, WebDAV or Google Drive.

Productivity & Utilities

• Print Friendly & PDF · by Print Friendly ChromeStrip the clutter to make any page printer- and PDF-friendly.
• Bubbles Screenshot & Screen Video Recorder · by Bubbles ChromeScreenshot, screen-record, and annotate in one go.
• Copy PlainText · by erosman FirefoxCopy text with all formatting stripped.
• Dictionary Anywhere · by Jeremy Schomery FirefoxDouble-click any word for a pop-up definition while you browse.
• To DeepL · by xpmn FirefoxRight-click any text and 'To DeepL' to translate it into your language.
• TWP — Translate Web Pages · by Filipe Dev FirefoxTranslate a page in real time.
• Imagus · by Deathamns FirefoxHover to enlarge images and play images/videos straight from links.
• Google Docs Offline · by Google ChromeEdit Google Docs offline.
• Application Launcher For Drive (by Google) · by Google Chrome
• Export links of all extensions · by Evgeniy Arbuz ChromeExport the full list of installed extensions.
• Old Reddit Redirect · by tomjwatson FirefoxForce Reddit to load the old design — the new one is ugly and user-hostile.
• Reddit Enhancement Suite · by honestbleeps, Andy Tuba, Ben FirefoxRES — a suite of tools to upgrade the Reddit experience.