What you can change in a PDF depends on the tool you use

You can edit text, images, and pages in a PDF, but not every tool does all three. Some tools let you change words and fix typos. Others let you add, delete, or rearrange pages. A few let you edit images or add shapes and highlights. The simplest edits — like changing a word or adding a comment — work in free tools. Bigger changes like removing pages or replacing images usually need paid software or a web-based editor.

The method you choose depends on what you're changing and whether you want to keep the file on your computer or use an online tool. This guide covers the most common edits and which tools work best for each one.

Key Takeaways

  • Free PDF readers like Adobe Acrobat Reader let you add comments and highlights but not edit the actual text or images.
  • To change words in a PDF, you need editing software like Adobe Acrobat Pro, Nitro, or a free web-based editor like Smallpdf or ILovePDF.
  • Editing text in a PDF is slower than editing a Word document because PDFs store text as images or locked objects, not as editable text.
  • If the PDF came from a scanned image, you may need optical character recognition (OCR) software to make the text editable at all.
  • Removing or rearranging pages works in most PDF editors, but replacing images usually requires paid software or converting the PDF to another format first.

Editing text in a PDF using free web tools

The fastest way to edit text without buying software is to use a free online PDF editor. Smallpdf, ILovePDF, and PDFtk are three common choices. These tools let you upload your PDF, click on text to change it, and download the edited file. They work in any web browser and don't require you to install anything on your computer.

Go to the website, click the upload button, and select your PDF file from your computer. Once the file loads, look for an edit or text tool in the toolbar. Click on the text you want to change, and a text box will appear. Delete the old text and type the new text. When you're done, click the download button to save the edited PDF to your computer. The whole process usually takes a few minutes.

One limitation: if your PDF is a scanned image (a photograph of a printed page), the text won't be selectable. You'll see the words but won't be able to click on them to edit. In that case, you need optical character recognition (OCR), which converts the image into editable text. Some free web editors include OCR, but it's slower and less accurate than paid options.

Editing text using Adobe Acrobat Pro or Nitro

If you edit PDFs regularly, paid software gives you more control and works faster. Adobe Acrobat Pro and Nitro Pro are the two most common choices. Both let you edit text, images, and pages in the same program. Adobe Acrobat Pro costs about $180 per year. Nitro Pro costs about $150 per year, though both offer free trials.

In Adobe Acrobat Pro, open your PDF and click the Edit PDF tool in the right panel. The text becomes selectable, and you can click any word to change it. A text box appears around the paragraph, and you can edit as if you were in a word processor. You can also add new text boxes, delete text, or change fonts and colors. For images, click the Edit tool and then click the image to move it, resize it, or delete it.

Nitro Pro works similarly. Open the file, click the Edit tab, and then click the text you want to change. The interface is slightly different from Adobe, but the steps are the same. Both programs also let you add comments, highlights, and shapes without changing the original text.

Removing or rearranging pages

Most PDF editors, including free ones, let you delete pages or move them to a different order. This is one of the easiest edits to make. In a free web tool like Smallpdf or ILovePDF, upload your PDF and look for a page management or organize option. You'll see thumbnails of each page. Click the trash icon to delete a page, or drag pages to rearrange them. Download the edited file when you're done.

In Adobe Acrobat Pro, open the Organize Pages tool in the right panel. You'll see thumbnails of every page. Right-click a page and choose Delete, or drag pages to reorder them. You can also extract specific pages into a new PDF or insert pages from another PDF file into the current one.

Deleting pages is permanent once you save the file, so make sure you're removing the right ones. If you're unsure, save the edited PDF with a new name so you keep the original file unchanged.

Adding images or replacing images in a PDF

Adding a new image to a PDF is possible in most paid editors and some free web tools. In Adobe Acrobat Pro, click the Edit PDF tool, then click the Add Image button in the toolbar. Select an image file from your computer and click where you want to place it on the page. You can resize and move the image after you add it.

Replacing an existing image is trickier. In Adobe Acrobat Pro, click the Edit tool, then click the image you want to replace. You can delete it, but you can't directly swap it for a new image. Instead, delete the old image and add a new one in its place. In free web tools, this option usually isn't available at all.

If you need to replace many images or make complex changes, consider converting the PDF to Word or another editable format first, making your changes there, and then converting back to PDF. This is often faster than editing inside the PDF itself.

Handling scanned PDFs and OCR

A scanned PDF is a photograph of a printed document. The text looks like text to you, but the PDF stores it as an image, so you can't click on words to edit them. To make a scanned PDF editable, you need optical character recognition (OCR), which reads the image and converts it into selectable text.

Some free web editors include OCR, but it's often slow or inaccurate. Adobe Acrobat Pro includes OCR and does it well. Open your scanned PDF in Acrobat Pro, click the Scan & Fix tool, and select Recognize Text. The software reads the image and makes the text selectable. This usually takes a few seconds to a few minutes depending on the file size.

After OCR runs, you can edit the text like any other PDF. Keep in mind that OCR isn't perfect — it can misread handwriting, faint text, or unusual fonts. Always check the converted text against the original image to catch mistakes before you save.

Saving your edited PDF

When you finish editing, save your file. In web-based tools, click the download button and choose where to save the file on your computer. In Adobe Acrobat Pro or Nitro, click File and then Save or Save As. If you want to keep the original file unchanged, use Save As and give the edited version a new name.

Be aware that some edits can increase the file size. Adding images or running OCR makes the PDF larger. If you need to email the file or upload it somewhere with a size limit, compress it first. Most PDF editors have a compress option in the File menu.

After you save, open the file one more time to make sure all your changes are there and look correct. This catches mistakes before you send the file to someone else.

Frequently Asked Questions

Can I edit a PDF in Microsoft Word?

Yes. Open Word, click File, then Open, and select your PDF. Word converts the PDF to an editable document. The layout may shift slightly, especially if the PDF has complex formatting or images. After you make changes in Word, save it as a PDF again if you need it in PDF format.

Why can't I click on the text in my PDF?

The PDF is likely a scanned image or the text is locked. Try opening it in Adobe Acrobat Reader and looking for an Edit tool. If nothing happens when you click on text, the file is probably a scanned image and needs OCR to become editable.

What's the difference between commenting and editing?

Commenting adds notes or highlights without changing the original text. Editing changes the actual words, images, or pages in the PDF. Free PDF readers let you comment, but most don't let you edit. To edit, you need editing software.

Will editing a PDF change the original file?

Only if you save over it. When you download or save an edited PDF, you're creating a new file. The original stays unchanged unless you specifically overwrite it. Always use Save As if you want to keep both versions.

Is it safe to upload my PDF to a free web editor?

Most free web editors delete your file after you download it, but read their privacy policy first. If your PDF contains sensitive information, use software installed on your computer instead, or use a paid web service with stronger privacy protections.