Do only female spiders build webs?

Both male and female spiders can produce silk and create webs.

It is generally accepted in the arachnological literature that adult female spiders build typical webs, while adult males do no web-building other than that required for courtship and sperm induction.

juvenile Male spiders build webs but when they grow up they usually stop.

The spiders seen living in a web are more likely to be female spiders.

While male spiders sometimes build webs, their webs are still less complex and usually smaller than that of a female spider. The full webs people see around are usually built by female spiders. See why many people find insects disgusting.

Male spiders build webs primarily for mating purposes. Male spiders build webs and pour their semen on it when they want to mate with a female.

While the female spider usually lives in or around the web, the male spider abandons the web and starts searching for a new female to mate with. This is why female spiders are usually noticed on webs.

Some male spiders use the webs already built by females to eat. Those spiders eat from the preys caught by the female spider's web.