Learn
Tutorials
Focused guides for the workflows students and tradespeople search for. Every feature shown here is free, with no account and no upload.
Measure angles in photos
Place a vertex and two rays on a photograph, refine with keyboard nudging, and read the ± uncertainty.
Measure on PDF pages
Open a multi-page PDF in the browser, step through pages, and measure without uploading.
Scale calibration for real lengths
Set a known distance between two points so lengths read in millimetres, inches, or feet.
Export for homework and reports
PNG, SVG, CSV for Excel, and a one-click HTML report with disclaimer.