Free online seo tools utilities with zero download required.
Calculate Cost Per Mille (CPM), ad impressions, and campaign advertising budget.
Generate Google SEO, Open Graph, and Twitter card meta tags with live preview.
Check Domain Authority (DA), Page Authority (PA), Spam Score, and backlink metrics for any website.
Scan essays, articles, and assignments for duplicate content and sentence-by-sentence plagiarism.
Detect text generated by ChatGPT, Gemini, and Claude with perplexity and burstiness analysis.
Analyze keyword frequency, single words, 2-word, and 3-word phrase density to prevent stuffing.
Check and auto-fix spelling, grammar, punctuation, passive voice, and readability issues.
Convert standard text into tiny unicode fonts, small caps, superscript, and subscript for social bios.
Copy invisible blank spaces, zero-width characters (ZWSP), and Hangul filler for names and bios.
Inspect HTTP response codes (200, 301, 404), TTFB response time, and security headers.
Generate Googlebot and search crawler compliant robots.txt files with custom user-agents, disallow directives, and sitemaps.
Generate valid Google Search Console and Bing compliant sitemap.xml files with change frequencies and priority tags.
Generate rich JSON-LD structured data for Articles, FAQs, Products, and Organizations to win Google Rich Snippets.
Preview and generate Facebook, LinkedIn, and Twitter/X social share card meta tags with live card previews.
Analyze incoming backlink profiles, referring domains, DoFollow vs NoFollow link ratio, anchor text distribution, and spam risk score for any website.
Perform a comprehensive technical SEO and performance audit: check title tags, meta tags, Core Web Vitals, mobile responsiveness, and HTTPS security.
Compare two text documents side-by-side to measure Jaccard similarity percentage, shared vocabulary, and duplicate phrases.
Compare two versions of website copy, blog posts, or landing pages and highlight additions and deletions visually.
Scan web pages, HTML snippets, markdown documents, and URL lists for broken hyperlinks, 404 errors, DNS failures, and redirect chains with instant diagnostics.
Audit marketing URLs to detect uppercase UTM parameters, missing campaign sources, spacing issues, and fix broken GA4 tracking.