How-To

How to Edit a PDF for Free: Add Text, Images, and More

Sep 10, 2026 · 6 min read

Quick summary: To edit a PDF for free, use Preview on Mac (Markup toolbar → Text tool to add text boxes), Microsoft Edge on Windows (Add text button in the toolbar), or the Files app Markup tool on iPhone. For rewriting existing text, convert to Word first, edit, then export back to PDF.

Editing a PDF used to mean paying for Adobe Acrobat. In 2024, there are half a dozen free ways to make the most common changes — adding text, filling forms, annotating, and even modifying existing content — across every major platform. This guide covers each method so you can pick the right one for what you actually need to do.

If you just want to read, summarize, or ask questions about a PDF without editing it, our free AI PDF reader handles that in seconds — no sign-up, no install.

What “editing a PDF” actually means

The term covers several different tasks:

What you want to do	The right method
Fill out a form	PDF form tools (any platform)
Add a note or comment	Annotation tools
Type new text on a page	PDF editor or “type on PDF”
Change existing text	True PDF editor (harder)
Add an image or signature	PDF editor or markup tools
Reorder or delete pages	PDF organizer tools

True text editing — changing words that are already in the document — is the hardest task because PDF is not a word processor format; the text is drawn at fixed coordinates. Most free tools let you add new content rather than rewrite existing text.

How to edit a PDF on Mac

Preview (built-in, free)

Preview’s Markup toolbar covers the most common edits:

Open the PDF in Preview.
Click View → Show Markup Toolbar (or click the toolbox icon).
Use the tools to:
- Text (T icon) — add a text box anywhere on the page.
- Shapes — draw rectangles to cover or highlight areas.
- Signature — draw or insert a saved signature.
- Highlight / Underline / Strikethrough — annotate existing text.
Save with Cmd + S.

Preview cannot modify existing text in the document — it only layers new content on top.

How to edit a PDF on Windows

Microsoft Edge (built-in, free)

Edge became a capable PDF editor in recent versions:

Open the PDF in Edge (drag and drop or right-click → Open with Edge).
The toolbar at the top shows Draw, Highlight, Erase, and Add text.
Click “Add text” to place a text box. Click anywhere on the page.
Type your text, adjust font size and color.
Press Ctrl + S to save.

Adobe Acrobat Reader (free tier)

The free Reader allows form filling, signing, and commenting, but not editing existing text. For annotation-style edits it is comprehensive:

Open the PDF in Acrobat Reader.
Go to Tools to access Sticky Notes, Highlight, and Stamp tools.
Use Fill & Sign for form fields and signatures.

How to edit a PDF on iPhone

Open the PDF in the Files app.
Tap the file to open it in Quick Look.
Tap the Markup icon (pencil tip in a circle) in the top right.
Use the toolbar at the bottom to draw, add text, or insert a signature.
Tap Done → Save File.

For more advanced mobile editing, the Adobe Acrobat mobile app has a generous free tier that includes form filling, annotation, and reordering pages.

How to edit a PDF online (free)

Several browser-based editors handle text additions without sign-up. Search for “free PDF editor online” and choose any well-reviewed option:

Upload your file.
Use the toolbar to add text boxes, images, shapes, or highlights.
Download the edited file.

Some online editors also offer limited true text editing — clicking existing text and retyping — though results vary depending on the document’s font and layout complexity.

Privacy note: Online editors upload your file to remote servers. Avoid them for sensitive or confidential documents.

How to edit a PDF: convert to Word first

When you need to substantially rewrite existing text, the easiest route is:

Convert the PDF to Word using Adobe Acrobat or the built-in PDF conversion in Microsoft Word.
Edit the .docx file in Word.
Export back to PDF with File → Export → PDF.

This works best for text-heavy documents without complex layouts. Multi-column designs and heavily formatted pages often lose their structure in conversion.

How to fill out a PDF form

Fillable PDF forms are the easiest edit:

Open the PDF in any modern viewer (Edge, Chrome, Preview, Acrobat Reader).
Click the form fields — they highlight automatically.
Type your answers.
Save the file.

If the fields do not highlight, the form is not fillable — it is a scanned image. In that case, use the “add text box” method described in the Mac or Windows sections above, or see our guide on how to make a PDF fillable to add proper interactive form fields.

How to edit existing text in a PDF (true editing)

Only a handful of free tools support this:

LibreOffice Draw — open the PDF directly; works well on simple layouts.
Inkscape — treats each page as a vector graphic; reliable but technical.
Some browser-based editors offer limited click-to-retype on clean, single-column PDFs.

For complex documents, the Word conversion method (above) is more reliable.

Common questions

Is it legal to edit a PDF?

Editing your own documents is always legal. Editing a PDF you received from someone else may violate the sender’s copyright or contract terms. Filling in a form you received is generally expected and permitted.

Why can’t I edit text in my PDF?

Most PDFs are not designed to be edited — the text is “frozen” at fixed positions. You can add new text on top, but rewriting existing content requires special tools or a conversion to Word first.

How do I edit a PDF without Adobe Acrobat?

Preview (Mac), Edge (Windows), and free online editors handle most common edits without any Adobe subscription. See the methods above for step-by-step instructions.

Can I edit a scanned PDF?

Scanned PDFs are images — there is no editable text inside them. You need OCR (Optical Character Recognition) software to extract the text first. Adobe Acrobat, ABBYY FineReader, and various online OCR tools can do this. Our AI PDF reading tool also reads scanned PDFs and extracts the content for you to search and summarize.