Convert tables structure to DiV blocks. Software/Tools?

Question

css

Good afternoon toasters) There is such a task on the nose:
Remake the structure of hundreds of pages on asp.net in Visual Studio, which were written ten years ago, to the current one with DiV blocks in % ratio with responsive design.
Before that, I always did everything by hand. But hundreds of pages of the same thing would take too long. Therefore, I would like to know, maybe someone knows, some tools that can greatly simplify (speed up) my work?

Answer 1

A script that goes through all files and changes tags according to a regular expression...)) The first thing that came to mind....