10 keyword difficulty testing site and 20 free keyword generator site

 As of my last knowledge update in January 2022, I can provide you with some popular tools that are commonly used for keyword difficulty testing and analysis in the field of search engine optimization (SEO). Keep in mind that the popularity and effectiveness of tools may change over time, so it's a good idea to check for the latest reviews and updates. Here are 10 tools for keyword difficulty testing:

1. Moz Keyword Explorer:

   • Website: Moz

2. Ahrefs Keyword Explorer:

   • Website: Ahrefs

3. Semrush:

   • Website: Semrush

4. Google Keyword Planner:

   • Website: Google Keyword Planner

5. KWFinder:

   • Website: KWFinder

6. SpyFu:

   • Website: SpyFu

7. SEMrush Keyword Difficulty Tool:

   • Website: SEMrush Keyword Difficulty

8. Ubersuggest:

   • Website: Ubersuggest

9. Serpstat:

   • Website: Serpstat

10. LongTailPro:

    • Website: LongTailPro

Remember that each tool may have its own approach to calculating keyword difficulty, and the results may vary. It's a good practice to use a combination of tools and cross-reference their data for a more comprehensive analysis. Additionally, new tools may have emerged since my last update, so it's worthwhile to explore the latest options available in the market.

As of my last knowledge update in January 2022, there are several free keyword generator tools available. Keep in mind that the availability and features of these tools may have changed since then. Here are 20 free keyword generator sites that were popular as of my last update:

1. Google Keyword Planner:

   • Website: Google Keyword Planner

2. Ubersuggest:

   • Website: Ubersuggest

3. Keyword Tool:

   • Website: Keyword Tool

4. AnswerThePublic:

   • Website: AnswerThePublic

5. WordStream Free Keyword Tool:

   • Website: WordStream Free Keyword Tool

6. Soovle:

   • Website: Soovle

7. Keyword Shitter:

   • Website: Keyword Shitter

8. Bulk Keyword Generator by HigherVisibility:

   • Website: Bulk Keyword Generator

9. IMforSMB Bulk Keyword Generator:

   • Website: IMforSMB Bulk Keyword Generator

10. SEMrush Keyword Magic Tool:

    • Website: SEMrush Keyword Magic Tool

11. Keyword Surfer:

    • Website: Keyword Surfer

12. Serpstat Keyword Clustering Tool:

    • Website: Serpstat Keyword Clustering Tool

13. KeywordIn:

    • Website: KeywordIn

14. Merge Words:

    • Website: Merge Words

15. LsiGraph:

    • Website: LsiGraph

16. SEOChat Suggestion Keyword Finder:

    • Website: SEOChat Suggestion Keyword Finder

17. SEOCockpit Keyword Explorer:

    • Website: SEOCockpit Keyword Explorer

18. Keyword Revealer:

    • Website: Keyword Revealer

19. KeywordTool.io:

    • Website: KeywordTool.io

20. Seed Keywords:

    • Website: Seed Keywords

Please note that some of these tools may offer free versions with limited features, and others may have restrictions on the number of searches you can perform. Always check the terms of use for each tool to understand their limitations and capabilities. Additionally, new tools may have been introduced since my last update, so it's a good idea to explore the latest options available.