chairagram

Photographs of a chair in, a chairmaker's measured drawing out — seat plan with sightlines, elevations, and the drilling angles to build from.

Open the annotator Attach your photos, calibrate, click the landmarks, get the drawing. Print the calibration sheet — Letter Print at 100%, never fit-to-page. Lay it under the chair, then on the seat. Print the calibration sheet — A4 Same sheet, A4 paper. The app tells the two apart on its own.

Your photos never leave this device. Everything — detection, calibration, drawing — runs in your browser. There is no account and no upload.

A drawing is only as good as what you measured; the app says so on every sheet it makes. Not a substitute for final shop drawings.