PixelWindow is easy to use, lightweight and cross-platform (thanks to Adobe AIR) transparent screen pixel ruler, with which you can measure anything on your screen, especially for designers.
BTW, this app's author page is gone. If you like it, please treasure it. It's hard to get it now!
Key Features
- Light-weight and cross-platform (Mac, Windows, and Linux).
- Adjustable opacity
- Open as many rulers as you need simultaneously
- Keyboard control
- Always-on-top option
- Presets for several common screen sizes
- Full-screen mode
- Easily copy dimensions to clipboard
- Open source and free
Keyboard Shortcuts
- Arrow keys: move the ruler by 1 pixel
- Shift + arrow keys: move the ruler by 5 pixels
- Command/Ctrl: resize the ruler by 1 pixel
- Shift + Command/Ctrl: resize the ruler by 5 pixels
- Mouse wheel: increase or decrease the transparency of the ruler
- Command/Ctrl + n: open a new ruler
- Double click: close a ruler
System Requirements
Download URLs
| License | Version | Download | Size |
| Freeware | v1.1 |  |
424 KB |
| v1.2 Final | |
437 KB |