Some older or stubborn games only offer fullscreen and windowed modes, with no borderless option, which makes alt-tabbing slow and multi-monitor use awkward. Borderless Gaming is a free, open-source tool that strips the title bar and borders from any windowed game and stretches it to fill the screen, giving you the fast alt-tab and clean multi-monitor behavior of true borderless mode. Here is how to set it up and when it helps.
Why borderless mode is useful
Exclusive fullscreen gives a game direct control of the display for the lowest latency, but switching away is slow and can cause flickering or crashes. Borderless windowed keeps the game running like any window, so alt-tabbing is instant, overlays behave, and you can glance at a second monitor without the game minimizing.
The trade-off is that borderless relies on the Windows compositor, which historically added a frame of latency and blocked adaptive sync. Modern Windows optimizations for windowed games and the Windows VRR toggle have narrowed that gap considerably, making borderless viable even for many competitive players.
Setting up Borderless Gaming
Install the app, launch your game in its normal Windowed mode at your monitor native resolution, then open Borderless Gaming. Your running game appears in the left list; select it and click the arrow to move it to the favorites list, or right-click and choose Borderless. The window instantly loses its border and fills the screen.
You can set a game as a favorite so it is made borderless automatically each time, and configure it to hide the mouse to the game window or span multiple monitors. Always match the in-game windowed resolution to your desktop resolution so the image fills the screen without scaling blur.
| Mode | Alt-tab speed | Latency | Adaptive sync |
|---|---|---|---|
| Exclusive fullscreen | Slow | Lowest | Native G-Sync/FreeSync |
| Borderless (built-in) | Instant | Very low on modern Windows | Via Windows VRR |
| Borderless Gaming tool | Instant | Very low | Via Windows VRR |
Tips and limitations
Borderless Gaming cannot add borderless mode to games that block window manipulation or use anti-cheat that flags external window changes, so test with single-player or tolerant titles first. It also does nothing for exclusive-fullscreen-only games; the game must be able to run in a window.
For the smoothest result, enable the Windows optimizations for windowed games and Variable refresh rate toggles under Settings then Graphics, then run the game borderless. That combination delivers fast alt-tab and tear-free frames with latency close to true fullscreen on current Windows builds.
When to use it versus alternatives
Reach for Borderless Gaming only when a game genuinely lacks a borderless option, because a built-in borderless mode is always the cleaner choice when available. Many older games and some indies only offer windowed and fullscreen, and that is exactly where the tool shines, stretching the window to fill the screen and removing the title bar for fast alt-tabbing and tidy multi-monitor use.
Match the game windowed resolution to your desktop resolution before making it borderless, or the image will be scaled and slightly blurry. Enable the Windows optimizations for windowed games and the VRR toggle so the borderless window still benefits from adaptive sync and low latency. For anti-cheat protected multiplayer games, prefer a native borderless option and avoid external window manipulation to stay safe.
Frequently Asked Questions
Does borderless mode increase input lag?
Historically yes, by about a frame, because it uses the Windows compositor. Modern Windows optimizations for windowed games and the VRR toggle have largely closed that gap, so the penalty is minimal on current builds.
Can Borderless Gaming get me banned?
With anti-cheat titles there is a small risk because it manipulates the game window externally. Use it on single-player or tolerant games, and prefer a game built-in borderless option when one exists.
Does Borderless Gaming work with every game?
No. It cannot add borderless mode to exclusive-fullscreen-only games, and some anti-cheat systems flag external window changes. Use it on single-player or tolerant titles, and prefer a game built-in borderless option whenever one exists.
Bottom line
Borderless Gaming is a handy fix for titles stuck with only fullscreen and windowed modes. Launch the game windowed at your desktop resolution, make it borderless with the tool, and enable the Windows windowed-game and VRR optimizations for near-fullscreen latency. Just be cautious with anti-cheat games, where a built-in borderless option is the safer choice.
