Screen Ruler
Supports multiple units: pixels (px), centimeters (cm), millimeters (mm), inches (in)
Screen Ruler
Pixel-level · Switch Physical Units Freely
Supports multiple units (px, cm, mm, in), free horizontal/vertical switching, drag-to-move, length adjustment via edge handle, always-on-top. Must-have tool for UI design, front-end development, and screenshot annotation.
Core Features · Precision Measurement
📏 Multiple Units Support
One-click switch between px, cm, mm, in. Suitable for UI design, graphic design, physical dimensions, etc. Accurate conversion based on 96 DPI.
🔄 Horizontal/Vertical Switch
Freely switch between horizontal and vertical rulers to adapt to different measurement directions, whether width or height.
🖱️ 拖拽移动 & 长度调整
Left-click and drag to move the ruler freely; drag the handle at the end to adjust the ruler length flexibly for various measurement ranges.
📌 右键菜单 & 置顶显示
Right-click menu to quickly switch units, direction, and pin status. Default always on top for convenient measurement.
⌨️ Keyboard Shortcuts
U 切换单位、R 切换方向、Esc 退出程序，无需鼠标也能高效控制。
🎨 精致视觉 & 抗锯齿
Custom drawing with GDI+, gradient background, shadow effects, rounded borders, clear tick marks, comfortable visual experience.
Technical Implementation · Solid and Reliable
Drawing Mechanism
Fully custom drawing with GDI+, supports anti-aliasing and clear text/tick rendering, maintaining fine texture whether scaling or moving.
Unit Conversion
Pixel ⇄ physical unit conversion based on 96 DPI standard, ensuring that the actual display of cm/in is highly consistent with real size.
Visual Effects
Gradient background enhances layering, shadow effects make the ruler float above the screen, rounded borders are more modern, tick marks are clear and readable.
Performance Features
Lightweight desktop application, extremely low memory usage, real-time response to dragging and scaling, no lag.
快捷键 & 交互方式
| Shortcut / Action | Description |
|---|---|
| U | Cycle units (px → cm → mm → in → px) |
| R | Switch horizontal/vertical orientation |
| Esc | Exit Screen Ruler program |
| Left-click drag on ruler body | Move ruler position |
| Drag the edge handle | Adjust ruler length (real-time tick update) |
| Right-click | Pop up shortcut menu (unit/orientation/pin/exit) |
| Always on top toggle | Ruler is always on top by default, can cancel via right-click |
Use Cases · Precision Everywhere
- UI/UX Design – Precisely measure webpage elements, icons, spacing dimensions
- Front-end Development – Verify page layout width/height, adapt to different resolutions
- Screenshot Annotation – Combine with screenshot tools to annotate dimensions, improve communication efficiency
- Graphic/Print Proofreading – cm/inch mode, directly estimate print size
- Teaching Demonstration – Show real-time dimensions of screen elements
- Mobile Adaptation – Quickly measure interface elements on simulators or real devices
- Industrial/Graphic Sketches – Aid screen-based dimensional reference
Single executable, no installation, no background ads. Essential tool for design and development.
Download Screen Ruler (Windows Version)Download URL: https://ohyewang.com/屏幕尺子.zip
Popular Tools
- Developer Tools
- JSON Tools
- Image Processing
- Doc Processing
- Network Tools
- Practical Tools
- Text Processing
- Unit Conversion