One of the best and free keyword research website is ahref . We can use without signup ahref keyword research tool.
Google Trends is a free keyword tool that lets you see which topics are trending in regions across the globe. In other words, popular keywords people are searching over internet.
Google Keyword Planner is a free keywords research tool provided by Google Ads .We can see search volume and trends. It's useful for finding keywords with high search volumes.
Semrush offers a comprehensive suite of SEO tools, including keyword research, competitive analysis, and more. It provides in-depth data on keywords, their search volumes, competition, and related keywords.
Ubersuggest is a freemium tool developed by Neil Patel that offers keyword research, competitor analysis, and content ideas. It provides data on search volume, CPC (cost per click), and keyword difficulty, making it useful for bloggers.