In pure survival, it is impossible to make an End Portal Frame. If you encounter a naturally generated portal, you must place eyes of ender in each of the frames. An eye of ender is crafted by an ender pearl and blaze powder.
In Creative Mode, you must have the End Portal Frames in your hand. Stand on a flat piece of land, or 5 x 5, and get in the middle of where you'll be placing the portal. place 3 portal frames 1 blocks away from you adjacently and continue this until you can't anymore. Then put eyes of ender in them facing the inside of the portal.
4J Studios hasn't put in The End yet but there's still portal frames (creative mode only)
Get some ender pearls by killing endermans and blaze powder which is crafted from blaze rods which can be obtained from killing blaze in the Nether. Craft eye of ender using ender pearls and blaze powder. Right click with the eye of ender on the end portal frame. Activate all frames to activate the portal.
Wilfred Cox has written: 'Nonlinear analysis of reinforced concrete portal frames'
CFR https://www.frostbank.com/cgi-bin/ecomm/portal/frost/frames/investorRelations.jsp
End Portals (or End Portal frames) are generated naturally in strongholds, and in extremely rare chances, some or all of the portal won't span. Several strongholds generate throughout a world. If completed with eyes of ender, a sound plays:block.end_portal.spawn. This is a global sound. This allows players to travel to The End, and is needed to complete the game's canonical story.
Place 3 End Portal Frame blocks on each side without corners, then place Eye of Ender in each frame to activate your portal. Note that, End Portal Frames cannot be obtained using Creative Mode and the give command. Mods will be required to obtain it.
Steven R. Preen has written: 'The design and analysis of haunched portal frames'
The best places to use wood frames include picture frames and garden frames. You can purchase wooden pictures frames online from websites such as Amazon.
To use a portal you right-click on the portal.
Place 3 End Portal Frame blocks on each side without corners, then place Eye of Ender in each frame to activate your portal. Note that, End Portal Frames cannot be obtained using Creative Mode and the give command. Mods will be required to obtain it.