Pakistan Tourist Visa officially granted to international travellers who are visiting country for Tourism purposes only.You can apply for e-tourist Visa online.
There are some countries who can easily grant the relaxation from the visa procedure. Travelers from these countries visit and see the beauty of Pakistan.
If you want to travel to Pakistan then you can read the detailed explanation of things you need before travelling to Pakistan.
The processing time for a visa valid 3-months is 7-10 working days, which is the same for those who are seeking an extension for 6-months.
For more than 6-months extension the processing time is within 4 weeks.
If you illegally stay in Pakistan then you pay the half penalties. That's why you need to stay legally.