Measure anything on your screen.
Pixel-accurate design tools in your menu bar — measure, pick colors, overlay designs, and record. No cloud, no account: everything runs locally.
One-time purchase. 14-day trial, 2.3 MB download, updates included.
Measure
Point at anything on screen and get its exact size and position — Inspector detects the edges of whatever is actually rendered, in any app, and snaps to them. Drag between two elements to read spacing and gaps in pixels or points.
Rulers
Drop persistent horizontal and vertical rulers anywhere on screen to check alignment across windows — verify that your build lines up with your grid without leaving the browser or simulator.
Pick colors
A loupe-precise eyedropper that grabs the color of any pixel in any app, in the format you work in. Every pick lands in a searchable history, and the built-in contrast checker tells you instantly if a pairing passes WCAG.
Magnifier
Zoom into any region of the screen for pixel-level detail — inspect anti-aliasing, hairline borders, and rendering artifacts without squinting or taking a screenshot first.
Design overlay
Float your mockup semi-transparently over the real, running build and spot every drifted pixel. Nudge, resize, and flip opacity to compare what was designed against what actually shipped.
Record
Capture a region of your screen at full refresh rate, then scrub through the recording frame by frame — perfect for reviewing animations, transitions, and those glitches that are too fast to see live.
Questions
Is this a subscription?
No. Inspector is $19, once. That includes the app and updates delivered right in the app.
How does the free trial work?
Download the app and use everything, full-featured, for 14 days. No account, no credit card. When the trial ends, buy a license key and enter it in the app.
Does it work with any app?
Yes. Inspector measures what your screen actually shows, so it works over browsers, design tools, simulators, terminals — anything you can see.
What permissions does it need?
Screen Recording (to read pixels for measuring and color picking) and Accessibility (for element detection). Everything is processed on your Mac — nothing is uploaded, and there's no telemetry.
Which Macs does it run on?
Apple Silicon Macs running macOS 14 Sonoma or later.