Google Keyword Planner

 

Keyword Surfer is a Chrome extension that provides keyword

search volume and difficulty insights right on Google search result pages

Look for icon:

 

KW Finder helps to find long-tail keywords with low competition

and also provides a difficulty score for each keyword. No longer free.

 

SEMrush Keyword Magic Tool

It is a powerful keyword research tool that provides difficulty scores

and allows you to filter keywords by various metrics.

 

Keyword Ninja

On my toolbar (binoculars)

Then put into KE (below) for search volume.

 

Keywords Everywhere

This is a Chrome Extension

Remember tio turn it off when finished!

Then use below for difficulty.

 

 Ubersuggest

Delivers KW Difficulty 1-100