Photo Composer
Mobile-first print and social layouts

Set physical photo size

This changes the document to an exact-size flow. Every photo receives the same physical frame and pages are repacked automatically.

Custom size

Change layout

About Photo Composer

Local session only

Photos remain in the browser session. This prototype does not upload, persist, or synchronize image data.

What is implemented

Multi-photo selection, print and social formats, pre-generated layouts, automatic paging, smart final pages, crop positioning, fit/fill, rotation, exact-size photo flow, high-resolution page rendering, image sharing, and browser print preparation.

Output assumptions

Social presets use fixed pixel dimensions. Paper pages render at 300 PPI before printing. Browser and printer settings can still affect final physical scaling, so production use requires a calibration sheet and tested printer profiles.

Social presets

The library includes Instagram square (1:1), portrait feed (4:5), landscape feed (1.91:1), and Story/Reel (9:16) canvases.

Prototype revision: 2026-07-20