Here are some excellent tools and platforms to find free long-tail keywords for SEO and content strategies:

1. Keyword Tool – This tool pulls keyword suggestions from Google’s autocomplete in real-time. While the free version limits search volume data, it generates a significant list of long-tail keywords for any given topic, ideal for initial research purposes.
2. Google Trends – Although primarily used to analyze search trends over time, this tool helps uncover related long-tail keywords. You can use it to track seasonal interest in certain keywords and identify rising search queries relevant to your niche.
3. AnswerThePublic – A unique platform that visualizes search queries based on user questions. It’s particularly helpful for finding long-tail keywords phrased as questions, which can be great for blog posts and FAQs.
4. Suggest Machine – This is a straightforward, free tool that generates a large set of long-tail keywords from your inputted topics. It’s especially useful for building keyword clusters based on search intent.
5. Keywords Everywhere (Free Browser Extension) – This tool shows related keywords and their search volume directly within your browser when you search Google. The free version offers keyword ideas without search volume, useful for brainstorming content ideas quickly.

These platforms can help you identify long-tail keywords that align with your content goals, even without a paid plan. You can combine them for the best results, ensuring your keywords are optimized both for user intent and search trends.