Observed arrival · 2026-09-02

A Protractor That Lives on the Screen

protractor.bond Observed source

Editorial interest 82/100 Selection signal · not a rating of the site

A browser-based protractor for measuring angles on screens, diagrams, and local photos.

Landing page captured for the 2026-09-02 issue.

Field notes

The workspace combines a draggable vertex, two adjustable rays, and live numeric output, with separate controls for image alignment and angle interpretation. It supports both ordinary and reflex measurements, plus degrees or radians, and offers snap presets from 1° through 90°. Local-photo mode, camera capture, grid, ruler, crosshair, and high-contrast options are visible; the page states that image processing stays in the browser.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

ƒJavaScriptBrowser-side code central

One card from the complete issue

A Commons Made of Smoke

312,505 arrived 1,000 judged 999 catalogued Enter the complete issue