The simplest way to edit a PDF depends on what you're changing

You can edit a PDF directly without converting it to another format, but the method depends on what you need to do. If you're adding text, filling in a form, or marking up a document, your computer's built-in tools or free software will handle it. If you're restructuring the document — removing pages, reordering sections, or changing images — you'll need different software. Most people can accomplish what they need with free options; paid software becomes useful only if you edit PDFs constantly or need advanced features like batch processing.

The right tool is usually already on your computer. Windows 10 and 11 include a free editor in Microsoft Edge. Every Mac has Preview. Both work without installing anything or creating an account, and both handle the most common editing tasks people face.

Key Takeaways

  • Windows 10 and 11 include a free PDF editor built into Microsoft Edge that lets you add text, draw, and highlight without installing anything.
  • Mac users can edit PDFs directly in Preview, which comes with every Mac, by adding text boxes, signatures, and annotations.
  • Free online editors like Smallpdf and ILovePDF work in your web browser and handle text, images, and page rearrangement without downloading software.
  • Adobe Acrobat Reader (the free version) lets you fill forms and add comments, but not edit existing text or images.
  • Paid software like Adobe Acrobat Pro or Nitro becomes worth the cost only if you edit PDFs multiple times per week.

Editing PDFs in Windows using Microsoft Edge

Microsoft Edge, the browser that comes with Windows 10 and 11, includes a free PDF editor you already have. Open any PDF file in Edge, then click the pencil icon in the toolbar at the top right. This opens editing mode without any additional software or account.

In editing mode, you can add text boxes by clicking the text tool and clicking where you want to type. You can draw freehand with the pen tool, highlight sections with the highlighter, and erase marks with the eraser. When you're done, click the save icon to overwrite the original file or save it with a new name. This method works for adding notes, filling in blank spaces, and marking up documents — but it cannot change text that already exists in the PDF.

Editing PDFs on a Mac using Preview

Preview, the image and document viewer built into every Mac, edits PDFs the same way Edge does. Open the PDF in Preview, then click the toolbox icon (it looks like a pen tip in a circle) in the toolbar. This reveals the markup tools without opening a separate process.

You can add text boxes, draw, highlight, add signatures, and insert shapes. To add a text box, click the text tool and click where you want to type. To sign the document, click the signature tool, then choose "Create Signature" if you haven't signed a PDF before — you can use your trackpad or an image of your handwritten signature. Save your changes by pressing Command+S or going to File > Save.

Using free online editors for more complex changes

If you need to rearrange pages, delete sections, or replace images, free online editors handle these tasks without installing software. Smallpdf, ILovePDF, and PDFtk are three widely used options that work in your web browser. Upload your PDF, make your changes, and read the edited file. No account is required, though creating one lets you save your editing history.

Smallpdf and ILovePDF let you delete pages by selecting them and clicking delete, reorder pages by dragging them, and merge multiple PDFs into one. Both also handle converting PDFs to other formats (like Word or Excel) if you need to edit in a different program. These sites are free for a limited number of edits per month; if you hit the limit, you can wait until the next month or pay for more edits. Be aware that uploading a PDF to an online editor means the file travels to that company's servers. If your PDF contains sensitive information, use your computer's built-in tools instead, or research the privacy policy of the online service before uploading.

What Adobe Reader can and cannot do

Adobe Acrobat Reader is free and comes pre-installed on many computers. It opens PDFs reliably and lets you fill in form fields and add comments or annotations. However, the free version cannot edit text that already exists in the PDF, add new text boxes, or change images — those features require Adobe Acrobat Pro, which costs money.

If your PDF is a form with blank fields (like a tax form or job process), Acrobat Reader is sufficient. You can click each field and type your information, then save the completed form. For anything beyond filling in existing form fields, you'll need to use Edge, Preview, or an online editor instead.

When to use paid PDF software

Adobe Acrobat Pro and Nitro Pro are the two most common paid options. Both cost between $10 and $20 per month depending on your subscription plan. They offer advanced features like batch editing (making the same change to multiple PDFs at once), optical character recognition (turning scanned images into searchable text), and more precise control over formatting.

These tools are worth the cost if you edit PDFs multiple times per week as part of your job. If you edit a PDF once a month or less, the free options will handle your needs. Many people buy a month of Acrobat Pro, complete their project, and cancel the subscription rather than paying annually.

Editing scanned PDFs and image-based documents

If your PDF is a scanned document or photograph rather than text created in a word processor, the editing tools work differently. You cannot select and change the text directly because the PDF is actually a picture of a page, not editable text. You can still add new text boxes, highlight, and draw on top of the image, but you cannot modify what's already there.

If you need to change the actual text in a scanned document, you need optical character recognition (OCR) software, which reads the image and converts it to editable text. Adobe Acrobat Pro includes OCR. Some free online editors like Smallpdf also offer OCR, though usually with a limit on how many pages you can convert per month. After OCR converts the document, you can edit the text like any other PDF.

Frequently Asked Questions

Can I edit a PDF without downloading software?

Yes. Windows users can edit in Microsoft Edge, which is already installed. Mac users can edit in Preview. If you prefer not to use those, free online editors like Smallpdf and ILovePDF work in any web browser without downloading anything.

Why can't I edit the text in my PDF?

The PDF is likely a scanned image or was created in a way that locks the text. You can still add new text boxes and annotations on top, but you cannot change existing text without OCR software. Try uploading it to a free online editor to see if that tool can edit it; if not, the text is locked or image-based.

Is it safe to upload my PDF to an online editor?

Most free online editors delete files after a few hours, but the file does travel to their servers. If your PDF contains passwords, social security numbers, or other sensitive information, use your computer's built-in tools (Edge or Preview) instead. Check the privacy policy of any online service before uploading confidential documents.

Do I need Adobe Acrobat Pro to edit a PDF?

No. The free tools in Windows Edge and Mac Preview handle most editing tasks. Adobe Acrobat Pro is only necessary if you need advanced features like batch editing, OCR, or precise formatting control, and you edit PDFs regularly.

What's the difference between Adobe Reader and Adobe Acrobat Pro?

Adobe Reader is free and lets you fill in form fields and add comments, but cannot edit text or images. Acrobat Pro costs money and can edit text, images, and pages, plus offers advanced tools like OCR and batch processing.