Best PDF Editor for iPhone: Edit and Sign Documents on the Go

Editing PDFs on an iPhone used to mean downloading an app from the App Store, but browser-based editing has made the process faster and simpler for iPhone users. The iPhone's smaller screen compared to the iPad means text editing requires a well-designed mobile interface, and signing documents is one of the most common PDF tasks performed on phones — signing rental agreements, tax forms, contracts, and school permissions slips while away from a computer. Apple's built-in tools handle basic markup through the Share sheet's Markup option, but this is limited to annotations and cannot modify existing PDF text. The App Store offers Adobe Acrobat Reader (free tier with paid editing), PDF Expert ($79.99/year subscription), and numerous other apps with varying quality and pricing models. Browser-based editing in Safari provides an elegant alternative. pdfeditor.website adapts its interface to the iPhone's screen size with touch-optimized controls for text editing, finger-drawn signatures, format conversion, and page management. It requires no app installation, consumes no storage, and works through Safari which is already installed on every iPhone. For quick edits and document signing on the go, this approach is faster than launching a dedicated app and navigating to your file.