How to edit a PDF on Windows — Edge, Word, and the browser
To edit a PDF on Windows, use Edge to draw, highlight and add text, or Word to change the words themselves. Or mark it up free in your browser with Annotate PDF, nothing uploaded.
Windows gives you two half-editors for PDFs and no whole one. Edge, which opens PDFs out of the box, lets you draw, highlight and type on top of a page. Word, if you have it, converts the PDF into a document whose words you can actually change. Neither does both jobs, and picking the wrong one is why editing a PDF on a PC feels harder than it should. Here is which to reach for, and the free browser route for the cases neither handles well.
Does Windows have a built-in PDF editor?
Not a full one. Microsoft Edge opens PDFs by default on Windows 10 and 11, and its toolbar can draw, highlight and add text on top of the page. It cannot change the words already printed there. Rewriting existing text means converting the PDF in Word or another converter first.
How do I edit a PDF for free in Windows?
To add marks, use Edge or Annotate PDF, both free. Edge is fine for a quick scribble. Annotate PDF, which runs in Edge or Chrome, adds clean boxes, circles and a see-through highlighter in five fixed colours, and every page is rendered and saved on your PC, nothing uploaded.
Open the tool in your browser
Open Annotate PDF in Edge or Chrome. It is an ordinary web page, so there is nothing to install and no account to make.
Choose the PDF
Drop in your file. Every page is rendered on your PC first, so a long document takes a moment before the toolbar goes live.
Pick a tool and a colour
Draw, Highlight, Text, Box or Circle, in one of five fixed colours, with a size slider from 1 to 8 for the stroke weight.
Mark the page
Drag to draw or highlight, or pull out a box or circle. For text, click where it goes, type, and press Enter to finish; Shift and Enter starts a new line. The page arrows move you through the document.
Save
Click Save annotated PDF. The marked-up copy is built on your PC and downloads with _annotated on the end of the name. Your original is never changed.
How do I edit an already existing PDF file?
To change the words themselves, convert the PDF into a Word document, edit it, and save it back as PDF. If you have Word, it does this directly: File, then Open, pick the PDF, and click OK when it warns that it will make an editable copy.
The warning is honest. A PDF stores letters at fixed positions, not paragraphs, so every converter has to guess where a paragraph or heading starts. Plain prose survives well; columns, tables and exact spacing come back approximate, and Microsoft itself warns that copier scans format badly. Without Word, PDF to Word does the same conversion in your browser. It sorts headings into two tiers by font size, keeps bold and italic, and refuses a scan outright, pointing you at OCR PDF to add a text layer first, rather than handing you an empty document.
Will my marks land in the right place on a sideways scan?
Yes. Scanned landscape pages are often stored upright with a flag telling the viewer to turn them, and Annotate PDF draws on the page exactly as you see it. On save, the overlay is counter-rotated against that flag, so your marks come out upright and where you put them.
We checked rather than assumed. We built a test page at each of the four rotations, stamped a mark in the top-left corner of the view, and read the saved file back with a different PDF library than the one that wrote it. At every rotation the overlay sat squarely on the visible page, its top-left corner in the viewer's top-left, and the page's own text still read out intact. Not every tool here manages this: page numbers on a rotated page land on what reads as a side edge.
How do you edit a PDF that you can't edit?
Work out which wall you hit. A PDF that asks for a password to open is turned away until you unlock it. A scan has no text to edit at all, only a picture of text, so it needs OCR first. Everything else can take marks on top, even when its words cannot change.
If you know the password, Unlock PDF removes it; it cannot crack one you do not have. For the deeper reason the format resists retyping, why editing a PDF is awkward walks through it.
Drawing a solid box over a name in Edge, Word or here does not remove it. We stamped a fully opaque box over a line of text with this tool, saved, and read the file back: the words were still there underneath, selectable and searchable. Covering is not deleting. If something must be genuinely gone, a black box is not redaction explains why, and Redact PDF is the tool that actually takes the text out.
What the marked-up file comes out like
- Your marks are flattened into the page as one transparent image per marked page, so they look the same in Edge, Acrobat or any other viewer, and nobody can switch them off.
- Only the marks are pixels. The page underneath keeps its full original quality, text included, and stays selectable.
- Flattened marks cannot be moved or deleted after saving, so keep the original if you might revise them.
- Undo reaches across the whole document, and so does Clear page: a cleared page comes back with undo.
- A text box you click but leave empty is dropped quietly instead of saved as a blank.
All of it runs in the browser tab you already have open, so nothing is uploaded, because there is no server to upload to. The full walkthrough is how to annotate a PDF; the Mac and Chromebook versions are how to edit a PDF on Mac and how to edit a PDF on Chromebook; and if the form has real fields, Fill PDF Forms completes them directly.
