Free On-Page SEO CheckerAudit Any URL in 30 Seconds

On-page SEO optimizes individual web pages to rank higher in search engines. It includes title tags, meta descriptions, headings, content quality, keyword usage, internal linking, image alt text, URL structure, and page speed. Unlike off-page SEO (backlinks), on-page factors are entirely within your control. On-page SEO helps search engines understand your content, directly influences rankings, improves user experience, and provides the foundation for all other SEO efforts. Our tool checks all critical on-page factors.

Critical factors include: content quality and depth that satisfies user intent; E-E-A-T signals (Experience, Expertise, Authoritativeness, Trustworthiness); Core Web Vitals (LCP under 2.5s, FID under 100ms, CLS under 0.1); mobile-first optimization; semantic keyword usage with natural language; strategic internal linking; structured data/schema markup; and user engagement metrics (dwell time, bounce rate, CTR). Our tool analyzes all these factors for comprehensive assessment.

On-page SEO focuses on content and HTML optimization—what users see—including keywords, headings, title tags, content quality, image alt text, and meta descriptions. Technical SEO deals with website infrastructure—how search engines crawl and index—including site speed, mobile responsiveness, XML sitemaps, robots.txt, HTTPS, site architecture, and canonicals. On-page makes content valuable and relevant; technical SEO ensures search engines can efficiently crawl and index. Both are essential. Our tool focuses on on-page content and HTML optimization.

Keyword density (percentage of times a keyword appears vs total word count) is largely outdated. Early SEO recommended 2-3%, but today this can cause keyword stuffing. Modern SEO focuses on semantic relevance and natural language. Use target keywords naturally in key locations (title, H1, first paragraph, subheadings), include related terms and synonyms, match search intent, and cover topics comprehensively. Write for users first, place keywords where they make sense, use variations, and satisfy search intent. Our tool analyzes context rather than just counting density.

No magic number exists, but best practices: include 2-5 contextual links per 1000 words; link to 3-5 important pages from navigation; aim for 5-10+ links pointing to pillar/cornerstone pages; avoid over 100 links per page. Quality matters more than quantity. Focus on relevant, contextual links with descriptive anchor text (avoid generic 'click here'), link to valuable pages, create logical content hierarchies with topic clusters, and balance deep links with navigational links. Our analysis checks linking patterns for optimal equity distribution.

Alt text: describe clearly in 10-15 words, include keywords naturally, make it accessible for screen readers. File names: use descriptive, keyword-rich names (product-blue-widget.jpg not IMG_1234.jpg) with hyphens. Compression: compress to under 100KB, use WebP/AVIF formats, implement responsive images with srcset. Dimensions: specify width/height to prevent layout shift, use appropriate sizes, consider lazy loading. Structured data: add ImageObject schema for key images. Optimized images improve page speed, rank in Image Search, and enhance accessibility. Our tool checks for missing alt text.

Semantic keywords are conceptually related terms that commonly appear in similar contexts. For 'coffee maker', semantic keywords include 'brew', 'filter', 'carafe', 'espresso', 'grounds'. Google understands these relationships through NLP and LSI. Semantic keywords help you rank for multiple queries, avoid keyword stuffing, demonstrate topic comprehensiveness, and match user search patterns. Find them by analyzing top competitors, using Google's 'People Also Ask', or tools like LSIGraph and SurferSEO. Incorporate naturally in subheadings, content, and alt text. Don't force them—write naturally and they'll appear organically.

Core Web Vitals are Google's user experience metrics and ranking factors (since 2021): Largest Contentful Paint (LCP) measures loading (should be under 2.5s—optimize images, remove render-blocking resources, use CDNs); First Input Delay/INP measures interactivity (under 100ms—minimize JavaScript, break up long tasks); Cumulative Layout Shift (CLS) measures visual stability (under 0.1—add image size attributes, avoid inserting content above existing content, preload fonts). Good CWV improves rankings, user engagement, mobile performance, and crawl frequency. Use PageSpeed Insights or Search Console to monitor.

Content length depends on search intent, not arbitrary word counts. General patterns: informational queries ('how to', 'what is') perform best at 1500-2500 words; commercial queries ('best', 'review') at 1000-2000 words; transactional queries (products) at 300-1000 words; local business pages at 500-1000 words. More important: satisfy search intent completely, cover related subtopics, use clear structure with headings and short paragraphs, include unique insights, and match/exceed competitor depth. Analyze top 10 results and aim to match quality, not just word count.

Yes, proper heading hierarchy is crucial. H1: use exactly one per page with your primary keyword, make it descriptive of main topic, place near top. H2: use for main sections (typically 3-7 for long-form content), include keywords naturally. H3-H6: use for subsections, maintain logical hierarchy (H3 under H2, H4 under H3). Heading hierarchy helps Google understand structure, improves scannability, and enhances accessibility. Avoid: multiple H1 tags, skipping levels, using headings for styling only, and keyword stuffing. Our analysis checks structure, counts, and keyword usage.

Search intent is the reason behind a user's query. Four types: Informational (how to, what is)—optimize with how-to content, FAQs, tutorials; Navigational (brand name, login)—optimize with clear branding and navigation; Commercial (best, review, comparison)—optimize with comparisons, reviews, buying guides; Transactional (buy, sign up)—optimize with clear CTAs, product pages, pricing. To identify intent: analyze top 10 results for your keyword, examine content types (blog posts, videos, product pages), check 'People Also Ask', and look for featured snippets. Our analysis evaluates content structure for intent matching.

Audit frequency depends on site activity: active blogs/news sites (monthly); e-commerce sites (quarterly, plus immediate checks for new categories); service/small business sites (quarterly); after major Google updates (within 2-4 weeks); when rankings decline (immediately). Audit: title tags and meta descriptions (unique, optimized, under limits), content quality (update old, expand thin, remove duplicates), internal linking (fix broken, add new, optimize anchor text), images (alt text, compression), schema markup, and mobile usability. Use our tool for individual pages, site-wide crawlers for comprehensive audits.

Common mistakes: duplicate content (fix with canonical tags, consolidate pages); thin content under 300 words (expand, add insights, or remove); keyword cannibalization (consolidate or differentiate targets); missing/duplicate title tags and meta descriptions (write unique for each page); poor URL structure (use clean, descriptive URLs with hyphens); ignoring mobile optimization (implement responsive design); slow page speed (compress images, minify CSS/JS, use CDN, implement caching); broken internal links (audit and fix). Our tool identifies many issues automatically.

Schema markup helps search engines understand your content and qualify for enhanced results. Impact: enables rich snippets (star ratings, prices, FAQs, recipes, events, products) increasing CTR by 20-40%; helps with Knowledge Graph inclusion; optimizes for voice search; improves content categorization; provides competitive advantage (only 30% use schema). Common types: Article/BlogPosting, Product/Offer, LocalBusiness, FAQPage, BreadcrumbList, Review/AggregateRating, VideoObject. Schema doesn't directly improve rankings but significantly enhances SERP appearance and CTR. Our tool detects existing schema; use our Schema Generator to create markup.

UX and SEO are intertwined. Direct UX ranking factors: Core Web Vitals (page speed, interactivity, visual stability), mobile-friendliness, HTTPS, intrusive interstitial penalties. Indirect UX signals: dwell time, bounce rate, pages per session, CTR from SERPs. UX elements impacting SEO: page layout and readability (short paragraphs, white space, clear hierarchy, scannable content); navigation (intuitive menus, breadcrumbs, logical linking); visual design (professional appearance, consistent branding); content accessibility (color contrast, alt text, keyboard navigation, heading hierarchy); interactive elements (clear CTAs, functioning forms). Google favors pages users find valuable and easy to use.