JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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You can use the Form Designer to control the space between each fields on the same line. Simply follow this guide to go to the Form Designer: Form Designer Tutorial: Let's create fantastic forms!
Then on the Form Designer, select the Design Tab and choose Line Layout. You can change the value between the Vertical Padding and the Horizontal Padding to adjust the spacing respectively.
To align the fields, select the Form Layout tab and check the Enable Form Columns. You can then set the number of columns you want for each row.
Please let us know if you need further assistance.