[Edit-Edit]:
MazeGen v2.0 is done! Clicky Clicky!

[Edit]:
I updated the tool a little, please force-refresh the page :) (Ctrl+F5 on Windows)

This is a little maze generator tool I made.

You can use it to generate random mazes of any specified size, but I recommend you to keep it under ~250*250. If the maze is larger than the 1000*1000 canvas, it will sadly get cut off. Reduce the thickness of the walls and passages to make the maze a little smaller =]

Controls:

Press [Spacebar] to generate a maze,
Press [Spacebar] again to restart.
Press [R] to reset above fields.
Press to toggle Drawing Speed.
When nothing is entered in the fields, the MazeGen will generate a 25*25 maze, with CellSize 5.
The "Instant Render?" checkbox determines if the MazeGen will show you the creation process, or if it will render the maze as fast as it can. Expect a little delay on huge mazes, if you check this checkbox.