It's possible replace null with any word or blank with regex?

Hi,
It's possible replace null with any word or blank with regex? Can someone show example of regex code?

Thank you

AFAIK this is not an issue as you will only see "null" in the WS browser tab. In the final CSV file, such fields are just blank.

Just wonder how can you get blank and I get null word in my CSV
Screenshot_259

Hey sorry, my bad. I got the CSV files confused with another scraper program.