The simplest way depends on what you're changing

You can edit a PDF in three ways: use free software built into your computer, use a web-based tool that doesn't require installation, or use paid software if you need advanced features. The right choice depends on whether you're adding text to a form, redacting sensitive information, combining files, or making layout changes.

Most people can accomplish what they need with free tools. If you're on Windows, you already have access to Microsoft Edge, which opens PDFs and lets you add text, draw, and highlight. On Mac, the built-in Preview app does the same. If you prefer not to install anything, you can upload a PDF to a free web tool and edit it in your browser — no account required for basic edits.

Key Takeaways

  • Windows users can edit PDFs directly in Microsoft Edge without installing anything; Mac users have the same capability in Preview.
  • Free web-based tools like Smallpdf, ILovePDF, and PDFtk let you merge, split, rotate, and add text without creating an account.
  • If you need to edit text that's already in the PDF (not just add new text on top), you'll need paid software like Adobe Acrobat or an alternative like Nitro or PDFtk Pro.
  • When uploading PDFs to web tools, check the site's privacy policy — some tools delete files after a few hours, others keep them longer.
  • For sensitive documents, editing offline on your own computer is safer than uploading to a web service.

Using the tools already on your computer

On Windows: Open the PDF in Microsoft Edge (right-click the file, select "Open with," then choose Edge). Click the pencil icon in the top toolbar. You can now add text boxes, draw, highlight, and erase. These changes save to a new file when you click the save icon. You cannot edit text that's already in the PDF — only add new content on top of it.

On Mac: Open the PDF in Preview (double-click the file, or right-click and select "Open with Preview"). Click the toolbox icon in the toolbar, then select the text tool to add text boxes, or the drawing tool to mark up the document. Like Edge, Preview lets you add and highlight but not change existing text. Save your changes by pressing Command+S.

Both tools are free and require no account. They work well for signing documents, filling out forms, adding notes, and highlighting sections. If you need to change text that's already printed in the PDF, you'll need different software.

Free web-based tools for common tasks

Web tools are useful when you don't want to install software or when you're on a computer that isn't yours. Upload your PDF, make your changes in the browser, and read the result. No account is required for basic edits on most of these sites.

For combining, splitting, or rotating files: Smallpdf, ILovePDF, and PDFtk all handle these tasks. Upload one or more PDFs, select which pages you want to keep or reorder, and read the result. These operations take seconds and work the same way on all three sites.

For adding text, images, or signatures: Smallpdf and ILovePDF both have text and drawing tools similar to Edge and Preview. Upload your PDF, click the text tool, and type or draw directly on the page. You can also upload an image of your signature and place it on the document.

For removing or hiding content: If you need to redact (black out) sensitive information, Smallpdf has a dedicated redaction tool. Upload the PDF, select the text or area you want to hide, and it becomes permanently covered. This is safer than using a marker because the underlying text is actually removed, not just covered.

Check each site's privacy policy before uploading sensitive documents. Most delete files after a few hours, but some keep them longer. If you're working with financial records, medical documents, or anything with personal information, editing offline on your own computer is the safer choice.

When you need to edit text that's already in the PDF

The free tools above can add new text on top of a PDF, but they cannot change or delete text that's already part of the document. If you need to edit existing text — for example, correcting a typo in a contract or changing a date — you need software that can access the PDF's text layer.

Adobe Acrobat Pro is the industry standard. It costs about $180 per year and lets you edit any text in a PDF as if you were working in a word processor. You can also edit images, rearrange pages, and add interactive form fields. A free 7-day trial is available if you want to test it before buying.

Nitro Pro is a less expensive alternative at around $120 per year. It offers similar text-editing capabilities and handles most of the same tasks as Acrobat. Some people find its interface simpler than Adobe's.

PDFtk Pro costs about $60 for a one-time purchase (not a subscription). It's more technical than Acrobat or Nitro — you work with forms and fields rather than free-form text editing — but it's powerful for batch operations and automation.

If you only need to edit text occasionally, Adobe's free online tool (part of your Adobe account) lets you edit one PDF per month at no cost. This is enough for many people who don't edit PDFs regularly.

Protecting your privacy when editing online

When you upload a PDF to a web tool, that file travels to the company's server, gets processed, and is then deleted (or kept, depending on their policy). This is convenient but carries a small privacy risk.

Most reputable PDF tools use encryption while your file is in transit and delete it from their servers within hours. However, if your PDF contains sensitive information — social security numbers, medical records, financial data, or passwords — uploading it to any web service means trusting that company's security practices.

For sensitive documents, use software installed on your own computer instead. Microsoft Edge, Preview, Adobe Acrobat, and Nitro all work offline and never send your files anywhere. The trade-off is that you have to install software, but the security benefit is real.

If you do use a web tool, use a private browser window (Incognito in Chrome, Private in Firefox, InPrivate in Edge) so your browser doesn't save the site in your history. This is a small extra step that leaves less trace of what you uploaded.

Editing PDFs on your phone or tablet

On iPhone or iPad: The built-in Notes app can open and mark up PDFs. Open the PDF in Notes, tap the markup tool (a pen tip icon), and you can draw, add text, and sign. Changes save automatically. For more advanced edits, Adobe Acrobat Reader (free app) lets you add text, draw, and fill forms, though editing existing text requires a paid subscription.

On Android: Google Drive can open PDFs and you can add text and drawings through the Google Drive interface. Adobe Acrobat Reader (free app) works similarly to the iOS version — you can mark up and sign but not edit existing text without a subscription. For free text editing on Android, try Xodo, which is a dedicated PDF editor with a free version.

Phone and tablet editing works best for signing documents, filling out forms, and adding notes. If you need to edit text that's already in the PDF, you'll have better results on a computer with dedicated software.

Frequently Asked Questions

Can I edit a PDF without installing anything?

Yes. Microsoft Edge (Windows) and Preview (Mac) are already on your computer and can add text, draw, and highlight. If you prefer web tools, Smallpdf and ILovePDF require no installation — just upload, edit in your browser, and read. Neither requires an account for basic edits.

How do I change text that's already printed in a PDF?

Free tools cannot do this. You need paid software like Adobe Acrobat Pro, Nitro Pro, or PDFtk Pro. Adobe offers a free online editor that lets you edit one PDF per month. If you only need this occasionally, that free tier may be enough.

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

Most reputable tools encrypt your file in transit and delete it within hours. However, if your PDF contains sensitive information like social security numbers or medical records, editing offline on your computer is safer. Check the site's privacy policy to see how long they keep files.

What's the difference between marking up a PDF and editing it?

Marking up means adding new content on top — text boxes, drawings, highlights, signatures. Editing means changing or deleting content that's already there. Free tools do marking up. Editing existing text requires paid software.

Can I edit a PDF on my phone?

Yes, but with limits. Built-in apps like Notes (iPhone) and Google Drive (Android) let you mark up and sign. For editing text that's already in the PDF, you'll need paid apps like Adobe Acrobat Reader Premium or Xodo Pro, or it's easier to use a computer.