How can I put a wooden bar across my garage entry door for security?

If the door swings out, a bar will not help . I suggest you install a deadbolt with at least 2 1/2 inch wood screws. Don't use the ones that come with the lock, they're too short and easy to kick in .

You can also put in a slide bolt that goes into the top of the door frame.

There are high-security strikes you can buy to go with the deadbolt, with screws or a rod at the back of the box to fasten into the building's frame. There are also special hinge pins. Look online or talk to a locksmith,

Can you reverse the door? Hinges should never be on the outside. Anyone can pop the hinge no matter how many locks or bars you have on the other side.

If the door opens out that would be tricky. Why not use cane bolts to secure the floor top and bottom. They affix to the door and then you drill down into the threshold and up into the frame. The bolts slide into these holes from inside the house and secure the door.

Want to have some fun do a lock like on a bank safe where you turn the wheel or handle and two long bars go into the wall . Being recessed would work great and it would be fun to look at and feel "safe"

Good Luck have fun Cm

Most residential building codes require a house-to-garage door to open into the garage, being a fire exit, etc. I don't think you could reverse the hinges without being outside /illegal of building code and that could hurt your home's value. I would recommend replacing your door with either a very solid wood door and some beefy hinges, or a metal door with big bolts would be best. You might want to rethink how easy it is to get into your garage from the outside and spend some money making that safer than just spending on an interior door. Hope this helps..

You do not need a bar. Think about it - door swings out - what good will a bar do? Nothing. Now on the inside you can install an additional latch similar to the one in this photo.

Securing the front door against burglary is very essential. Door hinges are a weak anchor point on many front doors. An intruder with a pry bar can lever open the door by popping the hinges without even trying the door locks. So it is essential to secure the entry doors with metal bars for better protection. Recently I changed the front doors of the house and installed custom entry doors. After the installation, I fixed security bars across the doors. I took a few ideas from this blog ( https://www.directdoors.com/diy-help-advice/how-fit-weather-bar-exterior-door/ ) for fixing the security bar. Likewise, you can fix the security bars for your garage entry door too. I would suggest you to go for metal bars rather than wooden bars for security purposes.

Installing upper and lower cane bolts on the inside of the door would secure it. I agree with M.M., take a good look at how secure your garage is from the outside, that would be a main point of entry.