A full PDF editor for iPhone, iPad, and Mac.
.PDFi does not rewrite text that is part of the original PDF. For a visual correction, use Whiteout to cover the old text and add a text box with the new wording. Export Flattened Copy bakes annotations into the page, so they are no longer separately editable. Whiteout and flattened export are not secure redaction: covered text or other content may remain recoverable. Do not use them to remove confidential information.
Your signature library is saved locally on each device and stays available between documents. Libraries do not automatically sync between iPhone, iPad, and Mac. Drawn signatures are placed in the PDF as vector ink; typed signatures are text annotations. Once placed and saved, a signature travels with that PDF when you share it.
.PDFi processes documents on your device and does not send them to the developer. If you choose iCloud Drive, another cloud file provider, or a sharing service, that service handles the files you save or share with it. See the privacy policy for details.
Some PDFs store ink as a fixed appearance without editable stroke paths. .PDFi hides color and width controls for those drawings to protect their appearance. You can still move, resize, or delete them. When the PDF retains editable stroke paths, those styling controls remain available after reopening.
If the PDF has real form fields in it, switch to Select mode and tap or click any field to type into it. If the form is just a flat scan with lines printed on it, use text boxes to type on top of it, then export flattened.
Open the Document menu and choose Export Password-Protected Copy. Enter a password, then choose a name and location for the new PDF. This exports a separate copy; it does not add a password to the original file.
RTF, RTFD, plain text, and HTML on every platform, plus Word documents on Mac. Open the Document menu and choose Convert File to PDF, then save the converted PDF where you choose. On Mac it opens for editing after saving. On iPhone or iPad, open the saved PDF from the document browser.
On iPhone and iPad, the system document browser autosaves edits to the file you opened. Duplicate the file first if you want to keep an unchanged original. On Mac, Save updates the open file; Save As lets you choose a new name and location, and Save a Copy writes a separate PDF. Closing an edited Mac document offers to save a copy.
In .PDFi 1.1, extra checks protect drawings from a PDF saving issue on iOS 27 beta. Certain encrypted or advanced PDFs, and pages with an offset page boundary, cannot use the workaround safely. If this happens, .PDFi reports an error instead of replacing the original with an incomplete PDF. Keep the document open and export a flattened copy to retain the visible edits. Flattening removes editable annotation and form structure and is not secure redaction. To retain editable content, try the document on Mac or a device running a stable iOS version.
Yes. iPhone, iPad, and Mac are covered by a single purchase through the App Store.
.PDFi has no accounts, advertising, or in-app analytics. Read the privacy policy for details about local files, chosen services, and contacting support.