Sign PDF — eSign, Fill & Stamp PDFs

Sign PDF turns your iPhone into a pocket document signer. Scan paper documents into clean PDFs with the built-in scanner, tap to fill out any form field, add a hand-drawn or typed signature, and import a business stamp or seal with automatic on-device background removal. Built for real-life paperwork — lease agreements, NDAs, contracts, tax forms, invoices and waivers — Sign PDF lets you save multiple signatures and stamps and export flattened PDFs that look identical everywhere. Everything happens on-device: nothing is uploaded, no account required. The core signing and scanning features are free forever; Sign PDF Pro adds batch signing, iCloud sync across devices, and unlimited saved signatures and stamps. Built by an indie studio as a fast, private alternative to expensive subscription-based PDF signing services.