SEO and AI visibility tools, free forever
29 tools, no watermarks. Enter a URL and we do the rest — live crawling, real keyword data, and AI generation on our servers. A free account unlocks the instant checks; the ones that spend on live data or AI are part of Pro.
Backlink Gap Analyzer
Find domains that link to your competitor but not to you. Discover your highest-ROI outreach targets instantly.
Open tool →ResearchKeyword Research
Generate hundreds of long-tail keyword variations complete with search volume, keyword difficulty, and intent data.
Open tool →ResearchFind Questions
Discover the questions your customers actually search for, with volume and difficulty. Build FAQ content that captures zero-click searches.
Open tool →WritingReadability Grader
Real Flesch Reading Ease, Flesch-Kincaid, and Gunning Fog scores on any pasted text.
Open tool →SchemaFAQ / Schema Markup Generator
Turn Q&A pairs into valid FAQPage JSON-LD, ready to paste into your site.
Open tool →WritingMeta Description Generator
Five ready-to-use descriptions with a live character counter. AI-enhance optional.
Open tool →WritingBlog Title Generator
10 titles across proven headline formulas — listicle, how-to, comparison, and more.
Open tool →PlanningBlog Outline Generator
A full H2/H3 skeleton from a keyword — pick how-to, listicle, comparison, or FAQ.
Open tool →PlanningContent Calendar Generator
Set your cadence, drop in topics, and download a real, ready-to-use CSV calendar.
Open tool →TechnicalOne-Page SEO Audit
Paste a page's HTML and get a real check: title, meta, headings, alt text, schema.
Open tool →ResearchKeyword Difficulty Estimator
Real search volume, difficulty, CPC, and the live top-10 SERP for any keyword — plus an instant heuristic estimate.
Open tool →ResearchBacklink Checker (Lite)
Live referring domains, total backlinks, and domain rank for any domain — or analyze your own link export.
Open tool →AI VisibilityAI Content Score Checker
A real structure and citability score — direct answers, headings, data points, readability.
Open tool →AI VisibilityAI Visibility Checker
A live check of whether AI assistants actually mention your brand for real buyer questions — no API key needed.
Open tool →AI VisibilityAI Overview Simulator
See a live, simulated AI answer to a real question using your article as the source.
Open tool →ResearchKeyword Cannibalization Checker
Paste URLs and target keywords to find your own pages competing against each other.
Open tool →Link BuildingLink Opportunity Finder
Enter a niche and get real Google search operators for guest post and backlink prospects.
Open tool →AI VisibilityAI Crawlability Checker
Paste robots.txt and see if GPTBot, ClaudeBot, and PerplexityBot are allowed or blocked.
Open tool →AI Visibilityllms.txt Generator
Enter your URL and get a complete llms.txt generated from your site's real pages — or build one manually.
Open tool →PlanningContent Cluster Generator
Turn a pillar topic into a full pillar + subtopic map for building topical authority.
Open tool →ResearchContent Gap Analyzer
Paste your topics and a competitor's to find what they cover that you don't.
Open tool →WritingSERP Preview Tool
See exactly how your title and meta description will look in Google, desktop and mobile.
Open tool →WritingOpen Graph Preview
Preview how your page looks when shared on Facebook, LinkedIn, or Slack before publishing.
Open tool →TechnicalHeading Structure Analyzer
Paste HTML and get a visual H1–H6 tree with warnings for skipped levels and empty headings.
Open tool →TechnicalRobots.txt Generator
Build a valid robots.txt with custom rules, sitemap link, and explicit AI bot controls.
Open tool →TechnicalRobots.txt Validator
Test any URL path against your robots.txt to see if it's allowed or blocked for a crawler.
Open tool →TechnicalXML Sitemap Validator
Paste sitemap.xml and check structure, URL count, lastmod dates, and common errors.
Open tool →AI VisibilityAI Content Detector & Humanizer
A transparent heuristic AI-likelihood score, plus an optional AI humanizer rewrite.
Open tool →TechnicalBroken Link Checker
Paste HTML or a URL list and find links that appear unreachable, checked live.
Open tool →Why these free SEO tools exist
Most "free SEO tools" online are lead-gen bait — a limited demo designed to push you toward a paid signup after two or three uses. These 29 aren't that. The instant checks run on real formulas and transparent heuristics, with no watermark on the output and a daily allowance on any free account. And the powered features don't fake it either: enter a URL and we actually crawl it, keyword numbers come from live search data, and the AI features run real models on our own infrastructure — no API key to paste. We are straight about where the line sits: crawling is free, and the ones that bill us per run — live keyword data, backlinks, AI generation — need Pro.
They cover three halves of modern SEO: the classic on-page mechanics (readability, meta descriptions, schema, audits, keyword difficulty, backlinks), the technical layer that keeps a site crawlable (robots.txt, sitemaps, heading structure, broken links, keyword cannibalization), and the newer discipline of making content citable by AI answer engines (AI crawlability, llms.txt, structure scoring, brand visibility, AI Overview simulation).
How to use these tools together
- Start with the Keyword Difficulty Checker and Content Gap Analyzer to sanity-check a topic and find real gaps before committing to it.
- Map out a full topic with the Content Cluster Generator, then build each article's shape with the Blog Outline Generator and a headline with the Blog Title Generator.
- Before publishing, run the Readability Checker, the AI Content Score Checker, the Heading Structure Analyzer, and the One-Page SEO Audit to catch structural gaps.
- Add a meta description, check the SERP Preview and Open Graph Preview, and add FAQ schema if the page has a Q&A section.
- Keep the site healthy with the Keyword Cannibalization Checker, Broken Link Checker, Robots.txt Validator, and XML Sitemap Validator.
- After it's live, check real visibility with the AI Visibility Checker, AI Overview Simulator, and AI Crawlability Checker.
Frequently asked questions
Are these free SEO tools actually free, or is there a trial limit?
The instant checks (readability, schema, previews, robots.txt building and more) are free on any account — no credit card, no watermarks, with a generous daily allowance. The ones that spend money on every run — live keyword data, real backlink numbers, and AI generation — are part of a Pro plan, because each one bills us for the search data or the model call behind it. Server-side crawling stays free.
Do I need to create an account to use these SEO tools?
Yes — every tool asks for a free account, which keeps the crawling honest and lets us hold abuse down. No credit card. Live keyword data, backlink numbers and AI generation additionally need Pro, since each of those runs costs us real money with a search-data or model provider.
Do I need my own OpenAI or Anthropic API key?
No. Every AI-powered feature — the AI Visibility Checker, AI Overview Simulator, humanizer rewrites, and all the generators — runs on seosorted's own AI infrastructure. You never paste an API key, and what you run is processed only to produce your result.
Start building your content library in under 8 minutes.
Your competitors are publishing every week. Every week you don't is a week of organic traffic going to them.
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