Yes, Google Keyword Planner is free. To use it, you must have a Google Ads account, which you can create in minutes at no cost. You can then use the basic features of the Keyword Planner without charges or hidden fees.

Google Keyword Planner can help you find keywords, discover search volume data, and get forecasts for marketing campaigns. Keyword Planner can be a valuable resource for small businesses, new marketers, and content creators who want to improve their SEO strategy without paying for expensive research tools.

If you choose to invest in a paid Google Ads campaign, you'll get more detailed search volume data and gain deeper insights for optimizing your marketing efforts.

Further reading: How to Use Google Keyword Planner