Image Measurement
Pixel ruler, angle measurement, color picker, grid overlay, aspect ratio calculator
Image Measurement — everything in your browser
Measure distances and angles in pixels, overlay rulers and grids, check colors, and calculate aspect ratios directly on your images. These tools are ideal for design QA, engineering screenshots, and precise visual specifications — all free and browser-based.
How to use these tools
- Choose Pixel Measure, Angle Measure, Image Ruler, Grid Overlay, Color Checker, or Aspect Ratio Calculator.
- Upload an image, then drag to measure distances, angles, or regions on the canvas.
- Read the measurements, copy values, or download an annotated image.
Frequently asked questions
Do measurements account for image scaling or DPI?
Measurements are in image pixels. DPI metadata does not change pixel distances; convert to physical units using the image's known DPI or a reference object in the scene.
Can I measure an angle between two arbitrary lines?
Yes. Place the angle tool's three points on the vertex and the two arms, then read the angle. For very small angles, zoom in first to place points accurately.
Is the grid overlay included in the downloaded image?
Yes, if you export the annotated image. Use a distinct grid color and spacing so the overlay remains readable on light and dark backgrounds.