A4Pad – Merge, Annotate PDF

Merge and create from PDFs, scans, photos, and screenshots into one document — or just annotate a single PDF. Edit your markup anytime. 100% offline, on iPhone and iPad.

Merge and create multiple documents into one, or open a single PDF just to mark it up. No account required. Everything stays on your iPhone or iPad.

A4Pad works two ways: consolidate content from multiple sources — PDFs, scanned pages, photos, and screenshots — into one organized document, or open a single existing PDF to annotate, highlight, and mark it up directly. No merging required if that's all you need.

Import everything into one notebook, arrange the pages exactly how you want, mark them up, and export a single polished PDF.

MERGE & CONVERT • Combine PDFs, scanned pages, photos, and screenshots into a single document • Convert images to PDF automatically on export • Reorder, duplicate, and organize pages with a tap

SCAN & IMPORT • Scan paper documents directly with your camera • Import photos and screenshots from your Photo Library or the Files app • Drop in existing PDFs — pages are merged in automatically

ANNOTATE — NOTHING IS EVER FINAL • Draw, highlight, and mark up any page, then keep refining it whenever you like • Nothing is burned into the page until you export — go back and change your mind anytime • Full Apple Pencil support on iPad, finger-friendly on iPhone

EXPORT • One tap to export a single, print-ready PDF • Share via Mail, Messages, AirDrop, or any app

PRIVATE BY DESIGN • Everything stays on your device — no account, no cloud, no login • No trackers, no ads, no data collection • You're always in control of your files

Organize your documents into Collections and Notebooks for a clear, consistent structure across every project — on iPhone or iPad.