How to Edit a PDF for Free (Text, Images, and Signing)

You can edit a PDF for free without Adobe Acrobat. For changing existing text, upload the PDF to Google Docs and edit it there. For adding text, images, and signatures to a finished PDF, use a free editor like Sejda or Smallpdf. The right method depends on what you need to change — here’s the full guide.

The quick way to choose a method

Method 1: Google Docs — edit existing text (free)

Best for correcting typos or rewriting the body text of a text-based PDF.

1. Upload the PDF to drive.google.com.
2. Right-click it → Open with → Google Docs.
3. Edit the text as you would a document.
4. File → Download → PDF Document (.pdf) to save.

Caveat: Google Docs re-flows the document, so complex layouts, custom fonts, and images can shift. If the layout matters, edit the text directly instead — see Method 2.

Method 2: Online editors — edit existing text, or add to a page

The tools below are not all the same, and the difference matters. Some can change text that is already on the page; others can only add new text on top of it.

Editing existing text in Sejda

1. Upload your PDF to Sejda’s editor.
2. Select the Text tool from the top toolbar.
3. Click directly on the text you want to change — a dotted box appears around that block.
4. Type your replacement. Use the floating toolbar to match the font, size, and colour.
5. Click Apply changes, then download the file.

If clicking a word selects the whole page instead, the PDF has no text layer — it’s a scan or a flattened file. The edit-existing-text tool can’t work on those. Whiteout the old text and type over it, or run OCR first (Method 4).

Adding text, images, and signatures

All three tools can add content — a text box, an image, a shape, or a signature — without touching what’s underneath. That’s the right approach when the original text is fine and you just need to annotate or sign.

The real distinction: “editing” a PDF is two different jobs — changing text that’s already there (needs a real text layer, so only some tools do it) versus adding something on top (any tool can). Pick by which job you have.

Method 3: Desktop apps — edit text directly

• Microsoft Word (Windows/Mac): open the PDF in Word (it converts automatically), edit, then Save As → PDF. Best if you already own Word — see the full how to edit a PDF in Word walkthrough.
• LibreOffice Draw (free): opens and edits PDFs on Windows, Mac, and Linux — a good free desktop option.
• Apple Preview (Mac): can add text, highlight, and sign, but not edit existing body text.

Method 4: Edit a scanned PDF

A scanned PDF is a picture of the page — there’s no selectable text to edit. Fix that with OCR (optical character recognition) first:

1. Run OCR with Adobe Acrobat online (free) or Sejda’s OCR (paid plan) — this makes the text searchable.
2. Then edit it with Google Docs (Method 1) or Word.

How to tell if a PDF is scanned

Try to select the text. If nothing highlights, it’s a scanned image — you’ll need OCR before you can edit the words. If text selects, it’s editable.

Related tasks (different from “editing”)

“Editing” often gets confused with these — each has its own guide:

• Sign a PDF — add your signature
• Type on a PDF / add text — overlay text without touching existing content
• Make a fillable PDF — add form fields
• Convert PDF to Word — edit in Word instead
• Edit a PDF in Canva — restyle the page visually

Need to fill in or protect a PDF rather than edit it? See how to create a fillable PDF and how to password-protect a PDF.

FAQ

Can I edit a PDF for free without watermarks?

Yes. Google Docs never watermarks, and Sejda’s free tier has no watermark (Smallpdf adds one on some outputs).

Can I edit text already in a PDF?

Yes, with Google Docs (Method 1), Word, or LibreOffice. Online “edit” tools mostly add new text — for changing existing text, use a method that converts the document.

How do I edit a PDF on my phone?

Use the Smallpdf or iLovePDF mobile apps to add text, or Adobe Acrobat Reader (free) to fill forms and sign. For full text editing, Google Docs’ mobile app works.

How do I edit a PDF on a Mac?

For annotating and signing, use Preview (built in). To change actual body text, upload to Google Docs — see how to edit a PDF on Mac.

How do I sign a PDF for free?

Use a free editor like Sejda or Smallpdf, or on a Mac open it in Preview → Tools → Annotate → Signature. See how to sign a PDF.

How do I edit a scanned PDF?

Run OCR first (Adobe Acrobat online, or Sejda’s paid OCR) to make the text editable, then edit it with Google Docs or Word.

Can I edit a PDF in Adobe Acrobat for free?

Adobe’s free online editor lets you add text and comments, but changing existing text needs Acrobat Pro. For a free way to edit existing text, use Sejda (Method 2) or Google Docs (Method 1) — see how to edit a PDF in Adobe Acrobat for the paid route.

What’s the best free PDF editor overall?

For changing existing text, Google Docs. For adding text/images with no watermark, Sejda. See the best free PDF editors for a full comparison.