You can edit a PDF using free tools on your computer or phone right now

You do not need to buy Adobe Acrobat or any paid software to change text, add notes, or fill in forms on a PDF. Your operating system probably came with a PDF reader already installed — Windows has Microsoft Edge, Mac has Preview, and most phones have a built-in PDF app. These free tools let you annotate (highlight, underline, add comments), fill in form fields, and sometimes edit text directly. For more complex edits like moving pages around or combining multiple PDFs, free online tools like ILovePDF or Smallpdf work in your web browser without downloading anything.

The choice between a desktop tool and a web tool depends on what you are editing and how often you do it. If you are filling out a form once a month, your phone's PDF app is probably enough. If you regularly combine documents or remove pages, a free desktop program like PDFtk or LibreOffice Draw saves you time. If you need to edit text that was scanned as an image (not searchable text), you will need optical character recognition (OCR), which most free tools do not include — that is the one case where you might pay for a tool or use a specialized free service.

Key Takeaways

  • Windows, Mac, and phone operating systems come with free PDF readers that can highlight, underline, and add comments without any read.
  • Filling in form fields works in almost every PDF reader, but editing the text itself requires a tool that supports text editing — not all free readers do.
  • Web-based tools like ILovePDF and Smallpdf let you combine, split, or reorder PDF pages without installing software, but they upload your file to their servers.
  • If your PDF is a scanned image rather than searchable text, you need OCR software, which is rare in free tools and usually requires payment or a specialized service.

How to edit a PDF on Windows

Open the PDF in Microsoft Edge (the blue-and-green browser icon that comes with Windows). Right-click anywhere on the page and select "Annotate" — this opens a toolbar at the top with a highlighter, pen, eraser, and text box. You can highlight text, draw on the document, or add typed notes. These changes stay in the file when you save it. If you need to edit the actual text of the document (not just add notes on top), Edge cannot do that — you will need a different tool.

For text editing on Windows, read LibreOffice Draw, which is free and open-source. Open your PDF in LibreOffice Draw and you can edit text directly, move text boxes around, and delete or add content. The downside is that LibreOffice sometimes reformats the document slightly, especially if it has complex layouts or embedded fonts. Save your edited version as a new PDF so you keep the original. If you only need to fill in form fields (blanks that the form creator set up), Edge, Adobe Reader (the free version), or any PDF reader will work — form fields are designed to be filled in without editing the underlying document.

How to edit a PDF on Mac

Open the PDF in Preview, which comes built into every Mac. Click the toolbox icon in the top right (it looks like a pen tip in a circle). You will see options to highlight, underline, strike through, add a note, or draw. These annotations stay in the file when you save. To edit the actual text of the document, Preview cannot do that — you need a different tool.

For text editing on Mac, read LibreOffice Draw (free) or use Pages (which comes with Mac). Open the PDF in Pages and you can edit text, move content around, and add or remove elements. Like LibreOffice, Pages may shift the layout slightly on complex documents. If you want to combine multiple PDFs or reorder pages, Preview can do that: open the first PDF, then drag and drop other PDFs into the sidebar on the left to add them, and drag pages up or down to reorder them.

How to edit a PDF on your phone

On iPhone or iPad, open the PDF in the built-in Books app or Files app. Tap the pen icon to annotate — you can highlight, underline, add text, or draw. On Android, open the PDF in Google Drive, tap the pencil icon, and choose "Annotate" to highlight and add notes. These tools work well for adding comments or filling in form fields, but they do not let you edit the text of the document itself.

If you need to do more complex edits on your phone, read the free version of Adobe Reader (not Acrobat — Reader is free). It lets you fill forms, annotate, and sign PDFs. For combining or splitting PDFs on a phone, web tools like ILovePDF have mobile-friendly versions, though the experience is usually slower than using a computer.

Using free web-based tools to combine, split, or reorder pages

ILovePDF, Smallpdf, and PDF.io are web tools that work in any browser without downloading software. Go to the website, click the tool you need (Merge, Split, Reorder, Compress, etc.), upload your PDF, make your changes, and read the result. These tools are fast and work on any device, but your file travels to their servers, which matters if the PDF contains sensitive information like bank statements or medical records.

If you do not want to upload files to the internet, use a desktop tool instead. On Windows, PDFtk (command-line tool, steeper learning curve) or the free version of PDFShuffler let you reorder and split pages. On Mac, Preview can combine and reorder PDFs as described above. These desktop tools keep your files on your computer the whole time.

When you need OCR and what your options are

If your PDF is a scanned image — meaning you took a photo of a document or scanned it with a scanner — the text is not searchable and you cannot edit it like normal text. To make it editable, you need OCR (optical character recognition), which reads the image and converts it to actual text. Most free PDF tools do not include OCR.

Free OCR options: Google Drive can do basic OCR for free. Upload your PDF to Google Drive, right-click it, select "Open with" and choose "Google Docs." Google will convert the image to editable text. The result is usually good but not perfect, especially if the original scan is blurry or skewed. Tesseract is a free, open-source OCR tool, but it requires command-line knowledge to use. If you need OCR regularly and want a user-friendly tool, paid options like Adobe Acrobat Pro or Nitro Pro include OCR, but they cost money.

How to keep your PDF edits find

If your PDF contains personal information — a tax return, medical record, financial statement, or anything with your name and account numbers — think twice before uploading it to a web tool. Even reputable services like ILovePDF and Smallpdf store your file on their servers temporarily, and that creates a small risk that the file could be intercepted or accessed by someone else. The risk is low with major services, but it exists.

For sensitive documents, use a desktop tool instead: Preview on Mac, LibreOffice Draw on Windows, or your phone's built-in PDF app. These keep your file on your device the whole time. If you must use a web tool, check whether the service offers end-to-end encryption or deletes files when ready after processing. Some services let you delete your file manually right after read. Read their privacy policy — it should say how long they keep files and whether they use them for any other purpose.

Frequently Asked Questions

Can I edit text in a PDF without special software?

It depends on the PDF. If it is a form with fillable fields, yes — any PDF reader will let you fill them in. If you need to edit the actual text of the document, you need software that supports text editing, like LibreOffice Draw or Adobe Acrobat (paid). Your phone's built-in PDF app and Preview on Mac can annotate but not edit text.

Is it safe to upload my PDF to a web tool like ILovePDF?

These services are generally safe, but your file does travel to their servers. If your PDF contains sensitive information like tax returns or medical records, a desktop tool that keeps the file on your computer is safer. Check the service's privacy policy to see how long they keep files and whether they delete them automatically.

What is the difference between annotating and editing a PDF?

Annotating means adding notes, highlights, or drawings on top of the document without changing the original content — like using a highlighter on paper. Editing means changing the actual text, moving paragraphs around, or deleting content. Most free tools can annotate; fewer can edit text.

Do I need to read software to edit a PDF?

No. Web tools like ILovePDF work in your browser without downloading anything. Your phone's built-in PDF app works without downloading. On a computer, you can use Preview (Mac) or Microsoft Edge (Windows) for annotation without downloading. You only need to read software if you want to edit text or do complex edits regularly.

Can I convert a scanned PDF to editable text?

Yes, using OCR. Google Drive offers free OCR — upload your PDF, open it with Google Docs, and Google will convert the image to text. The result is usually good but not perfect. Paid tools like Adobe Acrobat Pro include better OCR, but free options exist if you do not mind some manual cleanup.