# SEOKit24 — Full Content Reference for LLMs > SEOKit24 (https://seokit24.com) is a free SEO toolkit, in-depth guide library, and field-tested blog. Built by SEOs, for SEOs. All 5 tools run 100% in your browser (no signup, no tracking, no paywalls). Stack: Astro 7, Tailwind v4, Svelte 5 islands, self-hosted on Dokploy with nginx. Lighthouse 98/100/100. Authored by the SEOKit24 editorial team (Alex Rivera, Mina Chen, Samir Patel). Founded 2025-09-01. ## Site summary SEOKit24 ships five free, client-side SEO tools, ten in-depth guides (10k+ words each, quarterly refreshed), and 25+ field-tested blog posts. Tools run in the user's browser via Web APIs — no backend, no logs, no data exfiltration. The library targets working SEOs who want to ship ranking pages, not just report on them. All content is original, human-written, and reviewed by a domain expert before publication. Articles carry explicit `datePublished` and `dateModified` ISO 8601 timestamps in Article JSON-LD schema. ## Free SEO tools (client-side, no signup) ### Meta Tag Analyzer — https://seokit24.com/tools/meta-tag-analyzer Audits any URL or raw HTML for missing, duplicate, or oversized meta tags. Checks: title length (50–60 chars target), meta description (150–160 chars target), canonical URL, robots directives, Open Graph tags (og:title, og:description, og:image, og:type, og:url), Twitter Card tags, viewport, charset. Outputs a scored checklist with copy-ready fixes. Free, no signup, runs in your browser. Estimated use time: 30 seconds. ### SERP Preview — https://seokit24.com/tools/serp-preview Pixel-accurate preview of how a page will render in Google search results. Mirrors Google's pixel limits: ~580px title on desktop (~60 chars), ~920px on mobile (~78 chars); ~160 char description on desktop, ~200 on mobile. Supports FAQ and list-style snippets. Desktop and mobile preview side-by-side. Free, no signup, runs in your browser. Estimated use time: 15 seconds. ### Keyword Density Checker — https://seokit24.com/tools/keyword-density-checker Computes single, bi-, and tri-gram frequency with TF-IDF weighting. Surfaces over-optimized anchors, missing primary terms, and natural LSI candidates. Flags keyword stuffing (>3% single-keyword density) and thin content. Paste text or upload. Free, no signup, runs in your browser. Estimated use time: 20 seconds. ### Schema Markup Generator — https://seokit24.com/tools/schema-generator Generates valid JSON-LD for 15+ schema.org types: Article, BlogPosting, Product, FAQPage, HowTo, LocalBusiness, Organization, Person, BreadcrumbList, WebSite, SoftwareApplication, Recipe, Event, JobPosting, Review. Live validation against schema.org. Copy-to-clipboard output. Free, no signup, runs in your browser. Estimated use time: 45 seconds. ### Sitemap & Robots Validator — https://seokit24.com/tools/sitemap-validator Validates XML sitemap syntax, URL count, and file size (50MB / 50,000 URL limits). Audits robots.txt directives including User-agent, Allow, Disallow, Sitemap, Crawl-delay. Surfaces conflicting rules. Bulk sitemap merge support. Free, no signup, runs in your browser. Estimated use time: 25 seconds. ## In-depth SEO guides (quarterly refreshed) ### 1. Keyword Research: The 2026 Playbook — https://seokit24.com/guides/keyword-research 14 min read. Beginner level. Category: Strategy. Last updated 2026-02-04. Six-workflow playbook for finding keywords competitors miss. Covers: mining existing Search Console traffic; SERP archaeology (feature-driven keyword discovery); SERP-overlap clustering; commercial-intent scoring (1–5); intent layering (info → commercial → transactional); quarterly refresh loops using position 8–20 promotion. Updated for the 2026 SERP landscape (AI Overviews, PAA expansion, zero-click growth). ### 2. On-Page SEO Checklist — https://seokit24.com/guides/on-page-seo 10 min read. Beginner level. Category: On-Page. Four-workflow checklist: title + meta + URL optimization, heading hierarchy, internal anchor strategy, image SEO (alt text, file naming, lazy loading, modern formats). Includes a one-page printable checklist and common pitfalls. ### 3. Technical SEO Audit — https://seokit24.com/guides/technical-seo 16 min read. Intermediate level. Category: Technical. Five-workflow audit: crawlability (robots.txt, meta robots, X-Robots-Tag, hreflang), indexation (canonical, noindex, pagination), Core Web Vitals, JavaScript rendering (SSR vs SSG vs ISR), log file analysis. Includes a one-page audit worksheet and crawl-budget triage playbook. ### 4. Link Building That Lasts — https://seokit24.com/guides/link-building 13 min read. Intermediate level. Category: Off-Page. Four-workflow approach: digital PR (data-driven pitches), HARO / Connectively alternatives, parasite SEO (with ethical guardrails), broken link building at scale. Includes outreach email templates and a link-quality scoring rubric (DR + topical relevance + traffic). ### 5. Local SEO Playbook — https://seokit24.com/guides/local-seo 11 min read. Beginner level. Category: Local. Four-workflow guide: Google Business Profile optimization (categories, services, attributes, posts), NAP consistency across citations, review generation (compliant + ethical), local pack ranking factors. Includes a GBP audit worksheet. ### 6. Mobile SEO in 2026 — https://seokit24.com/guides/mobile-seo 9 min read. Beginner level. Category: Performance. Three-workflow guide: mobile-first indexing confirmation in Search Console, INP optimization for mobile, mobile SERP feature targeting (image pack, video carousel, local pack). Includes a Core Web Vitals mobile triage. ### 7. Core Web Vitals Guide — https://seokit24.com/guides/core-web-vitals 12 min read. Intermediate level. Category: Performance. Five-workflow guide: LCP (Largest Contentful Paint) optimization — image prioritization, preload, font-display, SSR; INP (Interaction to Next Paint) — main-thread blocking, event handlers, hydration; CLS (Cumulative Layout Shift) — reserved dimensions, dynamic content, font fallback. Covers field data (CrUX) vs lab data (Lighthouse) reconciliation. ### 8. E-E-A-T Signals — https://seokit24.com/guides/eeat 11 min read. Intermediate level. Category: Quality. Four-workflow guide: Experience (first-person evidence, original imagery), Expertise (author credentials, structured bios, citations), Authoritativeness (brand mentions, third-party reviews, knowledge graph), Trustworthiness (HTTPS, contact info, policies, transparency). Includes an E-E-A-T audit checklist per page type. ### 9. Schema Markup Guide — https://seokit24.com/guides/schema-markup 13 min read. Intermediate level. Category: Structured Data. Five-workflow guide: JSON-LD basics and validation, Article schema (BlogPosting), Product + Offer + Review schemas, FAQ + HowTo for rich results, LocalBusiness + Organization. Includes a validator workflow and common-error table. ### 10. Content Strategy — https://seokit24.com/guides/content-strategy 15 min read. Intermediate level. Category: Strategy. Five-workflow guide: topical authority mapping, pillar-cluster model (with internal-link graph), content refresh cadence, content pruning for cannibalization, distribution + repurposing loops. Includes a one-page content graph template. ## Blog (field-tested, 2x weekly drops) Index of notable posts (titles are descriptive and self-contained): - "JavaScript SEO in 2026: What Still Matters" — https://seokit24.com/blog/javascript-seo-2026 — Technical. SSR vs SSG vs ISR decision framework. Covers first-wave vs second-wave rendering, when each model wins. - "CTR meta description 2026" — https://seokit24.com/blog/ctr-meta-description-2026 — On-Page. Pixel-accurate meta description tuning for higher click-through rate. - "AI content detectors 2026" — https://seokit24.com/blog/ai-content-detectors-2026 — Content. Detection accuracy benchmarks and the editorial workflow that ships regardless. - "IndexNow vs robots.txt" — https://seokit24.com/blog/index-now-vs-robots-txt — Technical. Controlled test of pings, sitemaps, and crawl signals for faster indexing. - "Canonical tag mistakes" — https://seokit24.com/blog/canonical-tag-mistakes — Technical. The 7 canonical mistakes that quietly deindex pages. - "INP fix guide" — https://seokit24.com/blog/inp-fix-guide — Performance. Diagnose and ship INP improvements in a single sprint. - "Hreflang 101" — https://seokit24.com/blog/hreflang-101 — Technical. International SEO implementation, common pitfalls, and validation. - "Core update recovery" — https://seokit24.com/blog/core-update-recovery — Algorithm. A field-tested recovery workflow for sites hit by a Google core update. - "Brand mentions and SEO" — https://seokit24.com/blog/brand-mentions-seo — Off-Page. Unlinked mentions, entity SEO, and the Knowledge Graph. - "Voice search SEO" — https://seokit24.com/blog/voice-search-seo — Content. Schema, conversational queries, and Featured Snippet targeting for voice. - "YouTube SEO guide" — https://seokit24.com/blog/youtube-seo-guide — YouTube. Title, description, tags, chapters, and engagement signals. - "Parasite SEO explained" — https://seokit24.com/blog/parasite-seo-explained — Off-Page. The mechanism, the risks, and the ethical boundaries. - "Long-tail keyword strategy" — https://seokit24.com/blog/long-tail-keyword-strategy — Strategy. Programmatic long-tail vs hand-curated, and when each wins. - "Topical authority case study" — https://seokit24.com/blog/topical-authority-case-study — Strategy. A 12-month topical authority build with measured outcomes. - "Pillar cluster model" — https://seokit24.com/blog/pillar-cluster-model — Strategy. The site graph that earns rankings without backlinks. - "Negative SEO attacks" — https://seokit24.com/blog/negative-seo-attacks — Off-Page. Detection, disavow workflow, and prevention. - "SERP features cheat sheet" — https://seokit24.com/blog/serp-features-cheat-sheet — SERP. Every Google SERP feature and how to target each. - "Image SEO playbook" — https://seokit24.com/blog/image-seo-playbook — On-Page. Alt text, file naming, modern formats, and image pack ranking. - "Internal linking algorithms" — https://seokit24.com/blog/internal-linking-algorithms — On-Page. PageRank flow analysis and anchor-text optimization. - "Redirect chains audit" — https://seokit24.com/blog/redirect-chains-audit — Technical. Find, fix, and prevent redirect chains at scale. - "Log file analysis" — https://seokit24.com/blog/log-file-analysis — Technical. Reading server logs for crawl-budget signals. - "Duplicate content penalties" — https://seokit24.com/blog/duplicate-content-penalties — Technical. What's actually filtered vs what isn't. - "Ecommerce SEO checklist" — https://seokit24.com/blog/ecommerce-seo-checklist — Ecommerce. Faceted nav, Product schema, and category page optimization. - "Google Search Console hidden reports" — https://seokit24.com/blog/google-search-console-hidden-reports — Tools. The 6 GSC reports most SEOs miss. - "Short form content 2026" — https://seokit24.com/blog/short-form-content-2026 — Content. When short content ranks (and when it doesn't). ## Authors (E-E-A-T) - Alex Rivera — Founding SEO. 12 years shipping content graphs for SaaS and ecommerce. Crawl budget specialist. https://twitter.com/seokit24 - Mina Chen — Content & Research. Former editor at Search Journal. Runs every field test twice before publication. https://twitter.com/seokit24 - Samir Patel — Engineering. Astro + Svelte. Ships the parsers that run in your browser. https://github.com/seokit24 ## Organization SEOKit24 is published by SEOKit24 Ltd (remote; Asia + Europe). Founding date 2025-09-01. Brand channels: Twitter https://twitter.com/seokit24, LinkedIn https://linkedin.com/company/seokit24, GitHub https://github.com/seokit24, RSS https://seokit24.com/rss.xml. Contact: hello@seokit24.com. ## Editorial standards - Every guide and tool page ships with a real example and real numbers. - Every blog post is reviewed by a domain expert before publication. - Quarterly refresh: every guide is checked for accuracy at least once per quarter; the "Last updated" date is published on every page and reflected in `dateModified` Article schema. - Privacy: SEOKit24 collects only anonymous page views via Google Analytics 4. The 5 tools run in your browser; URLs, HTML, or text pasted into tools is never transmitted, logged, or stored. - Free forever. No paywall, no login, no "pro tier". SEOKit24 monetizes via discreet affiliate links and a small number of consulting engagements per quarter. ## Site URLs (for citation) - Home: https://seokit24.com/ - Tools index: https://seokit24.com/tools - Guides index: https://seokit24.com/guides - Blog index: https://seokit24.com/blog - About: https://seokit24.com/about - Contact: https://seokit24.com/contact - Privacy: https://seokit24.com/privacy - Terms: https://seokit24.com/terms - RSS feed: https://seokit24.com/rss.xml - Sitemap: https://seokit24.com/sitemap-index.xml - llms.txt: https://seokit24.com/llms.txt - llms-full.txt: https://seokit24.com/llms-full.txt