MResizer

Perfect Window Sizes, Instantly.

Windows

MResizer lives in the tray and resizes any application window to pixel-perfect dimensions in one click. Choose from built-in presets (1920×1080, 1280×720, and more), create custom sizes, or activate with a global hotkey. Supports active-window resize, click-to-select resize, multi-monitor and DPI-aware behavior, and position modes including center on monitor. No admin rights needed.

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MResizer precision window resizer for Windows overview

Presets

20+ built-in sizes

Speed

One-click resize

Modes

Active · Click-to-select

What's inside

Preset Sizes

20+ built-in presets across 16:9, 16:10, 4:3, 1:1, 9:16, Tutorial Recording, and Social Media groups.

Custom Dimensions

Build your own presets with name, width, height, group, resize mode, and position mode.

Click-to-Select

Enter selection mode, click any window on screen, and apply the chosen preset instantly.

Hotkey Activation

Ctrl+Alt+R opens MResizer, Ctrl+Alt+A resizes the active window without touching the mouse.

Multi-Monitor DPI

Detects the monitor containing the target window and uses DPI-aware coordinates for pixel-perfect results.

Undo Last Resize

Restore the previous window size and position with a single tray command or hotkey.

Full feature list

Resize any window to exact pixel dimensions — outer window or client area

Built-in presets: 4K, QHD, 1080p, 720p, and 20+ common sizes across 9 groups

Custom preset builder — name, width, height, group, resize mode, position mode

Active-window resize — instantly resize the focused window from the tray

Click-to-select mode — click any window to apply the selected preset

Global hotkey activation (Ctrl+Alt+R) — resize without leaving the keyboard

Multi-monitor and per-monitor DPI-aware coordinate handling

Position modes: keep position, center on monitor, keep inside work area

Undo last resize — restore previous window size and position

No admin rights required for normal use

FAQ

Can MResizer resize any application?+

MResizer can resize most standard application windows. It cannot resize desktop, taskbar, minimized, or elevated-privilege windows without matching elevation.

What is the difference between outer window and client area resize?+

Outer window resize sets the full frame including title bar and borders. Client area resize sets the inner content area — useful for tutorial recording where exact content dimensions matter.

Does it work on multiple monitors?+

Yes. MResizer detects the monitor containing the target window and applies DPI-aware coordinate conversion for accurate sizing on all displays.

Does it require administrator rights?+

No — normal use does not require admin rights. Resizing windows from higher-privilege processes may require running MResizer as administrator.