How to Edit a PDF: Acrobat, Word and Mac Preview Compared

To edit a PDF, open it in a tool that can change PDF content directly, such as Adobe Acrobat’s Edit mode, or convert it into an editable document in Microsoft Word, make your changes, and save it back as a PDF. If you only need to fill in a form, sign, highlight or add notes, a free viewer like Preview on the Mac is usually enough.

The right method depends on what kind of “edit” you mean. Changing the actual words and images on the page is different from marking it up, and both are different from editing a scanned document. Below is how each official route works, as described in Adobe, Microsoft and Apple’s own help pages as of October 2026. Menu names shift between versions, so expect small differences in your copy of each app.

Pick the right method first

That last row is worth a moment. Microsoft itself suggests editing the source Office file and re-exporting to PDF when you can. A PDF is designed as a finished, fixed layout, so going back to the source avoids conversion problems entirely.

How to edit a PDF in Adobe Acrobat

Acrobat edits the PDF in place, which keeps the original layout intact. Adobe documents this for the desktop app, Acrobat on the web, and the mobile apps.

On desktop (Windows or Mac)

1. Open the PDF in Acrobat.
2. Switch to Edit mode from the global bar at the top.
3. Click inside a text box and type to correct text. You can change font, size and alignment, and add superscript or subscript.
4. To work with an image, select it. You can flip it vertically or horizontally, rotate it 90 degrees left or right, or crop it by dragging the selection handles.
5. Save the file.

Adobe lists a few limits on its text editing help page:

• Edits stay inside the text box you selected. You can’t drag a text block to another page, or move or rotate individual characters or words within a box.
• Fonts matter. You can fully edit text only if its font is installed on your computer. If the font isn’t installed but is embedded in the PDF, you can only change its color or size. If it’s neither installed nor embedded, you can’t edit that text.

For images, Adobe’s image help page is candid that Acrobat’s image-editing tools are limited, and that very high-resolution images can slow things down because they make the file larger. For serious photo work, edit the image elsewhere and replace it.

On the web

In Acrobat on the web, choose Edit, then Edit text & images, and upload your file. Selecting an image lets you rotate, delete or replace it, or add text to it. Adobe says changes are saved automatically to Adobe cloud storage, so keep that in mind for confidential documents.

On a phone or tablet

According to Adobe’s mobile help, editing text in a PDF on mobile requires an Adobe Acrobat subscription. Image changes (resize, rotate, crop, delete) are available from the context menu when you tap an image. Adobe’s newer help pages also describe an AI Assistant that can apply an edit you describe in plain language; check whether it’s available on your plan before counting on it.

How to edit a PDF in Microsoft Word

Word doesn’t edit the PDF itself. It converts the PDF into a Word document you can edit like any other, and then you save it back out as a PDF if you need one.

1. In Word, go to File > Open and choose the PDF.
2. Word tells you it will make a converted copy. Confirm. The original PDF is not changed.
3. Edit the document normally.
4. To get a PDF again, open the save dialog, pick PDF from the Save as type dropdown, and confirm.

What to expect from the conversion

Microsoft’s Opening PDFs in Word page sets realistic expectations:

• The converted file may not line up page-for-page with the original. Lines and pages can break in different places.
• It works best on documents that are mostly text, like business, legal or scientific documents.
• If a page is mostly charts or graphics, the whole page may come through as a single image, and that text can’t be edited.
• Some elements convert poorly, including tables with cell spacing, footnotes that span pages, endnotes, tracked changes and PDF comments. If your file relies on these, Microsoft suggests opening the PDF directly instead of converting it.

Browser and cloud limits

The PDF viewer built into OneDrive and SharePoint can’t edit PDFs, per Microsoft’s Edit a PDF page. You’d need to convert the file to .docx first, using desktop Word or Word for the web. Microsoft notes the web conversion may also look different from the original.

How to fill, sign and annotate a PDF in Preview (Mac)

Preview ships with macOS. It’s the quickest route when “editing” really means filling in, signing or marking up a document, though it isn’t built to rewrite the existing text on the page.

Fill out a form

1. Open the PDF in Preview.
2. Click a form field and type.
3. If a field won’t accept typing, add a text box from the Form Filling toolbar and place it where you need it.

Apple notes that on macOS 14.2 or later, enhanced AutoFill can fill in contact details on some forms.

Sign a document

1. Show the Markup toolbar and click the Sign button.
2. Create a signature using your trackpad, the built-in camera, or an iPhone or iPad.
3. Drag the signature into place and resize it with its handles.

Annotate and redact

The Markup toolbar includes text, shapes and a redaction tool, as described in Apple’s annotation guide. How you save matters:

• File > Save, File > Export or File > Export to PDF keeps annotations editable.
• File > Print, then Save as PDF, flattens the annotations so they can no longer be edited.

Editing scanned PDFs

A scanned PDF is essentially a picture of each page, so there’s no text to click on until it’s been through text recognition (OCR). Microsoft’s route is to scan the document to PDF and then open it in Word, which converts it the same way as any other PDF; again, mostly-text pages give the best results. Whatever tool you use, proofread the converted text, because recognition is rarely perfect.

Practical tips

• Work on a copy. Word already does this for you; with other tools, duplicate the file first.
• Check the result before sending. Converted files can reflow, so scroll through every page, especially tables and footnotes.
• Be careful with sensitive files. Web-based editors upload your document, and Acrobat on the web saves to Adobe’s cloud. If a document is confidential, check your organization’s policy before uploading it anywhere.
• Prefer the source file. If someone sent you a PDF exported from Word or PowerPoint, asking for the original is often faster than any conversion.