Hi Guys this is best free tool https://www.seolazy.com this tool is for SEO and Backlinks Building
You can gain following advantages from this website
Search Analytics Tools – establish your marketing goals and establish a baseline for where you are at right now.
Keyword Research Tools – discover the keywords your customers are searching for right now.
On-Page SEO Audits – find out if your pages are well optimized and compare your performance against leading competitors.
Competitive Research Tools – see what keywords your competitors are targeting.
PPC Tools – buy important keywords and track the results to understand how well they convert,which helps you focus you organic SEO strategy on the most profitable keywords.
Link Analysis Tools – start building your link profile and track your progress compared to competing websites.
Search Engine Ranking Checkers – determine how effective your marketing is by watching your search engine rankings improve.
Google algorithm updates – highlights of major Google updates