DynamoDB client in local with UI like PHPMyAdmin

YES! I've finally found a solution after struggling with this myself:

Run your local dynamodb jar with the following command java -jar DynamoDBLocal.jar -dbPath . [this will create a file in whatever directory the Dynamo jar is located in].
Download SQLite Database Browser and extract/install it.
Start SQLite Database Browser
Navigate to "Open Database" from the file menu
Navigate to the directory from 1. Select the file [in this case, ****_us-east-1]
You should then see the database contents!!

Hope this helps - it's been frustrating me no end!

!! EDIT !! - in response to original question edit.

Doubts

1) Do I have to run a SQL to see table data? I thought there would be GUI for this.

2) I am not able to use where clause in SQL. What if I want to see one or two records from all? Is there a way to use conditions in this?

3) All fields of a row is not visible and I am not able to scroll it horizontally ?

Yes - you can do a simple "select" statement, for instance in my examples: "SELECT * FROM tweet_item" returns me the following screenshot:
Seemingly inadvertanyl - whilst I couldn't get the direct SELECT * FROM XX WHERE XX to work, the like statement does. For instance SELECT * FROM tweet_item where tweet_item.hashKey like "%425665354447462400%" returns me the tweet with tweet_id [my hashKey] of 425665354447462400:
Strange - I seem to be able to scroll quite happily [although it is Windows not Mac]. It also automatically tries to re-size the outer frame, too.