A fast, native pixel-measurement overlay for designers and developers. Snap to objects. Drop guides. Read distances. Vernier runs on macOS, Windows, and Linux — including Wayland.
Vernier sits as a transparent overlay on top of every other window. Hit the hotkey and the whole screen becomes measurable.
Drag between any two points on the screen and read the distance in real device pixels — no zoom math required.
Sweep a rectangle near any UI element and the overlay locks to its bounds. Get exact width and height in a single drag.
Drop horizontal and vertical guides that stick to screen elements. Check alignment across windows and apps.
A full-screen reticle that follows the cursor. Spot misalignment across an entire layout at a glance.
Toggle the overlay from anywhere with a configurable shortcut. Auto-installed on Hyprland; portal-based on other compositors.
Capture the screen with your measurements baked in. Hand specs to designers and engineers in one paste.
The competition is macOS-only. Vernier is built from day one to be native everywhere — including Linux on Wayland, which most measurement tools won't touch.
Apple Silicon and Intel. Drop-in replacement for PixelSnap. Free.
Windows 10 and 11. Per-monitor DPI awareness baked in.
First-class support for both X11 and Wayland. Hyprland is the primary development target.
Vernier is a single statically-linked Rust binary with a transparent native overlay on each platform. No Electron. No web runtime. No background bloat.
Free, open source, and on every desktop you use. No license server, no email signup, no upsell.