A native pixel-measurement overlay for designers and developers. Edge-detected snaps that lock to real element bounds. Sticky guides, pinned measurements, and region capture with one-click handoff to your annotation tool. macOS, Linux, and Windows.
Edge-detected snaps that lock to real element bounds. Sticky guides. Measurements you can drag and pin. Region capture that hands off to your annotation tool. Built for designers and developers who measure for a living.
Drag a region near any UI element and the box locks to its actual bounds — not just where your cursor was. Adjustable RGB tolerance handles shadows, gradients, and low-contrast edges.
Press H or V to pin the current crosshair as a dimension pill. Pin a dozen — labels auto-arrange to avoid overlap, each with a dashed tether back to its measurement. Nudge any pill aside to read the pixels underneath.
Drop horizontal and vertical guides that stay put across windows. Hold a modifier to flip H↔V mid-placement; arrow keys nudge by 1 px, with SHIFT for 10 px.
Click any measured region's camera pill to capture just that area. Auto-detects your installed annotation tool — CleanShot X, Shottr, Satty, Swappy, Flameshot — and opens the capture there. PNG output is DPI-tagged so it renders at logical size everywhere.
A companion plugin reports Figma's viewport zoom over a local bridge. Measurements inside the Figma window report canvas pixels at any zoom — no more multiplying by 1.73× in your head.
Hit Enter and the dimensions land on your clipboard in your format: plain 1024,768, CSS width: 1024px;, SASS, or height-first variants. Pick once in prefs; paste forever.
Native overlays on macOS, Linux, and Windows. Wayland is first-class via wlroots layer-shell — not a screenshot daemon, not a portal hack. Most measurement tools won't touch it.
Apple Silicon native. Borderless transparent overlay with a menu-bar icon. Free and open source.
Windows 10 and 11. Per-monitor DPI awareness baked in.
First-class Wayland support. 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.