Nexmetra

Nexmetra is a collection of four free, browser-based measurement tools built for accuracy and simplicity — no ads, no sign-up, no downloads.

Online Ruler: auto-calibrates to your exact screen for real-world accurate measurements, with point markers and full measurement history.

Protractor: switch between 180° and 360° modes, measure to 3 decimal places, toggle between degrees and radians, and use overlay mode to measure angles directly on an uploaded image, or ray mode to draw angles from three points. Export both the canvas and your measurement history.

Aspect Ratio Calculator: instantly find the missing height or width for any ratio, check a file against your chosen ratio, and preview how it crops across social media platforms.

Aspect Ratio Finder: upload any file to get its exact ratio, then test other files against it.

Everything runs entirely client-side — nothing is uploaded to a server. Built for designers, students, photographers, and video editors who need fast, exact measurements without the clutter of typical free tools.