Best free PDF reader (2026)

You do not need to download anything to read PDFs anymore. Your computer already has a perfectly good PDF reader built in. The reason people still search for one is that Adobe Acrobat Reader feels like the only "real" choice, and that has not been true for a long time.

The honest truth about Adobe Acrobat Reader

Adobe Acrobat Reader is free but installs more than just a reader. The default install adds Adobe Cloud, browser extensions, scheduled update services, and a startup task. It also constantly nudges you to upgrade to paid Acrobat Pro. The reader itself is fine; the rest is bloat.

Unless your work or school specifically requires Adobe Reader, the built-in tools in Windows and Mac are simpler and lighter. If your IT department requires it, install only the Reader (not the Pro trial) and uncheck the optional extras during install.

Best free PDF readers for Windows

1. Microsoft Edge (already installed)

Edge is built into Windows 10 and 11. It opens PDFs by default the moment you double click one. What it does:

• Read PDFs in a clean reader view
• Fill out form fields (text, checkboxes, dates)
• Draw and add text annotations
• Sign with a drawn signature
• Highlight and add comments
• Read aloud (built in screen reader)
• Save the filled file back out as a PDF

Most people do not need anything else.

2. Sumatra PDF

The lightest reader on Windows. Tiny install, opens instantly, no toolbars, no upsells. Great if you read PDFs a lot and Edge feels heavy. No editing or form filling, just reading. Download from sumatrapdfreader.org.

3. PDFgear (free, ad supported)

Newer option that handles more than reading: convert, merge, split, compress, sign. Has an AI assistant feature that pulls text from documents. Free with no premium upsell, supported by the developer's paid mobile apps. Download from pdfgear.com.

4. Foxit PDF Reader

Heavier than Sumatra but lighter than Adobe. Has form filling, annotations, signatures, and tabs for multiple files. It pushes its paid upgrade more than I like, but the free version is solid. Download from foxit.com.

Best free PDF readers for Mac

1. Preview (already installed)

Mac's built in Preview is genuinely the best free PDF tool on any platform. It is hiding in plain sight. What it does:

• Read, search, and bookmark
• Fill forms (clicks straight into text fields)
• Sign with trackpad or by holding paper up to your Mac's camera (works shockingly well)
• Highlight, underline, strikethrough, and add notes
• Combine multiple PDFs (drag and drop pages)
• Rotate, crop, rearrange, and delete pages
• Export as image, Word docx, or other formats
• Reduce file size (File > Export > Quartz Filter > Reduce File Size)

Open any PDF. Click Tools in the menu bar. Click Annotate to see the full toolbar. There is no setup.

2. Skim

Free, open source, designed for reading academic papers. Better navigation for long documents, notes that follow you across sessions, presentation mode. Download from skim-app.sourceforge.io.

3. PDF Expert (paid, but free trial worth knowing about)

Not free, but the cleanest paid editor on Mac if you need real text editing inside PDFs (not just fill-in fields). One time purchase, no subscription. Try the 7 day free trial before deciding.

What about iPhone and iPad?

Use the built in Files app and Apple's Books app. Tap a PDF, then the markup pen icon to draw, sign, highlight, or fill forms. You can also use Preview-style markup straight from the Files preview. No download needed.

What about Chromebook?

Chrome itself opens PDFs. Click the pen icon to annotate, sign, and fill. For more tools, install PDFgear from the Play Store or use a web tool like iLovePDF in Chrome.

Reading vs editing: which one do you actually need?

Most "I need a PDF editor" problems are really form filling, which Edge and Preview already handle.

How to set a default PDF reader

Windows

1. Right click a PDF file.
2. Click Open with > Choose another app.
3. Pick your reader. Check Always use this app.
4. Click OK.

Mac

1. Right click a PDF.
2. Click Get Info.
3. Find "Open with" and pick your app.
4. Click Change All.

Avoid these

• "Free PDF Reader Pro" type apps from sketchy websites. Always download from the developer's real site or your computer's app store.
• Free PDF editors that ask for an email or account before you can save. They keep a copy of your document. Use one of the picks above instead.
• Adobe Acrobat Reader's bundled extras. If you must install it, uncheck Google Chrome, McAfee, and any other "optional" software during install.