Free tools. SEO metrics you can run right now.
Keyword research, competitor and gap analysis, backlink audits, technical checks and AI-search readiness. Enter a domain, URL or keyword and the results open on app.search.co: your first search is free with no account, and further searches need a free search.co account.
Keyword research
Demand, difficulty and intent for the queries you want to own.
Keyword Research
Volume, difficulty, CPC and intent for one keyword.
Keyword Generator
Expand a seed term into related keyword ideas.
Topic Research
Subtopics, questions and headlines around a topic.
Keyword Rank Checker
The keywords a domain ranks for, with positions.
Competitor research
What rival domains rank for, where their traffic lands and what they bid on.
Competitor Analysis
Compare two to five domains side by side.
Keyword Gap
Keywords competitors rank for that you don't.
Top Pages Checker
A domain's pages ranked by estimated organic traffic.
Website Traffic Checker
Modeled organic traffic for any domain.
PPC Competitor Research
A domain's paid keywords and ad copy.
Backlinks & authority
Link profiles, referring domains, link gaps and risky links.
Backlink Checker
The backlink profile of a domain or URL.
Domain Authority Checker
Authority, traffic and keyword snapshot of a domain.
Referring Domains Checker
Every unique domain linking to a site.
Backlink Gap
Domains linking to competitors but not to you.
Toxic Link Checker
Flag risky and spammy backlinks for review.
Technical & on-page
Crawlability, indexation signals, speed and on-page markup.
Site Audit
Crawl up to 25 pages; issues ranked by severity.
SEO Score Checker
Homepage on-page score with prioritized fixes.
Site Speed Tester
Core Web Vitals field data plus Lighthouse lab data.
Title Tag Checker
Title, meta description, canonical, OG and H1.
Broken Link Checker
Every link on a page checked for errors and redirects.
Sitemap Validator
Discover and validate a site's XML sitemaps.
Robots.txt Tester
Parse robots.txt and test paths per user-agent.
Technology Lookup
Detect the CMS, frameworks and tools a site runs.
AI search
Readiness for AI crawlers and answer engines, plus agent prompts.
Want a full diagnostic, run by humans?
Our paid SEO audit covers 200+ ranking factors across technical, content, and backlink layers — with a remediation plan and optional implementation. The free tools are a starting point; the full audit is the real diagnostic.