Range Notebook Target Analyzer
Upload a target photo, mark scale and shots directly on the image, then get group size, zero correction, and a saved local range note.
This is the fast version of a range notebook: upload a target photo, set one known distance, click the bullet holes, and get the answer you came for.
The analyzer measures group size, mean radius, MOA/MIL, point-of-aim offset, and click correction from marks you place directly on the image. Save the note locally or export a clean result card when you want to keep it with your load work.
Turn a target photo into an answer.
Upload a clear target, set one known distance, click the holes, and get group size plus zero correction. Photos and notes stay in this browser.
Target workspace
Upload a photo to begin. The active step will change as you mark the target.
See the group, not a spreadsheet.
Start with a target photo. You will mark scale, aim point, and shot holes directly on the image, then get the result card on the right.
Fine tune marks
| Point | X px | Y px | Type | Move |
|---|---|---|---|---|
| No points marked yet. | ||||
Local notebook
Saved sessions live in this browser. Export JSON if you want a backup.
JavaScript is required because the tool measures a local photo in your browser. Measurements are photo-calibrated estimates; confirm zero with another group.
Measurement Note
This tool measures a photo, not the physical target. Camera angle, paper curl, scale length, and click placement can all move the result. Calibrate across the largest known distance you can, square the target to the camera, and treat the output as a range-note estimate.
Privacy Note
Photos and saved sessions stay in the browser through local storage. Nothing is uploaded to Holdover unless you manually share or publish an exported file.