What is the Best free Tool for onPage LSI

[webvivre]

Have read Google Keyword planner is useful plus lsikeywords.com - but the latter seems to be down.

Any other suggestions please?

 

[Darryl Peddle]

Few tools I like for long tail and competitive or trend data...

Keywordsnatcher.com

Kwfinder.com (excellent tool with trend and rank data)

Soovle.com/

Keywordtool.io

Others that are great for competitive data and filtering:

SemRush.com

Ahrefs.com

Spyfu.com

KeywordSpy.com

One other tool that has been around a long time....

Wordtracker.com (although i rarely use this one anymore)

 

[Steve Mark]

semrush and google keyword planner best for research keyword.

 

[T J Tutor]

Longtail Pro is pretty good too.