A free PDF reader lets you open, read, search and print PDF files, and many also let you highlight, comment and fill in forms. Small viewers open files fastest, while fuller readers add signing and annotation. If you mainly need to sign forms, check the reader's own feature list first, because that's often included for free.
PDFs are everywhere in business: invoices, contracts, brochures, tax forms and the manuals nobody reads. A good reader opens them quickly and gets out of the way, and you shouldn't need a subscription for that.
Here are ten free PDF readers in no particular order, sorted alphabetically, including small open-source viewers and names you'll recognise. Each description comes from the tool's own website, re-checked today. If you're wondering why so much business paperwork ends up as PDFs, my post on the benefits of PDFs for business explains it.
A quick note before you choose: a reader isn't an editor. Readers view and mark up files, while editors change the text itself. If you need to rewrite a paragraph, you'll want an editor instead.
Free PDF readers at a glance
In the free plan column, Yes means the tool's own site describes a free version or free plan, Trial only means a time-limited trial, and No means neither is stated. Free versions often come with limits, so check what's included before you rely on one.
| Tool | Type | Good for | Free plan |
|---|---|---|---|
| Adobe Acrobat Reader | PDF reader from the format's creator | Signing and commenting on PDFs | Yes |
| Apple Preview | Built-in Mac viewer | Reading and marking up PDFs on Mac | Yes |
| Evince | GNOME document viewer | Simple viewing on Linux | Yes |
| Firefox | Web browser with a PDF viewer | Opening PDFs without another app | Yes |
| Foxit PDF Reader | Desktop PDF reader | Feature-rich reading on Windows | Yes |
| Microsoft Edge | Web browser with a PDF reader | Reading PDFs aloud on Windows | Yes |
| MuPDF | Lightweight PDF viewer | Fast viewing on any system | Yes |
| qpdfview | Tabbed PDF viewer | Several PDFs open in tabs | Yes |
| SumatraPDF | Free open-source Windows reader | Opening PDFs instantly on Windows | Yes |
| Zathura | Keyboard-driven document viewer | Reading with the keyboard | Yes |
Ten free PDF readers to try
Adobe Acrobat Reader
Best for: People who receive forms and contracts and want to fill, sign and comment on them on desktop or mobile.
Apple Preview
Best for: Mac users who want to read, highlight and sign PDFs without installing another app.
Evince
Best for: Linux users who want a plain, reliable document viewer that handles PDFs and a few other formats.
Firefox
Best for: Anyone who opens PDFs from email or the web and is happy to read them in a browser tab.
Foxit PDF Reader
Best for: Windows users who want a full reader with commenting, form filling and a familiar ribbon layout.
Microsoft Edge
Best for: Windows users who want a PDF viewer that's already installed and can read documents aloud.
MuPDF
Best for: People who want a tiny, fast viewer for reading PDFs and e-books without extra features getting in the way.
qpdfview
Best for: Linux users who read lots of documents side by side and like a tabbed, no-frills viewer.
SumatraPDF
Best for: Windows users with older or slower machines who want a reader that opens files instantly with no ads.
Zathura
Best for: Linux users who like keyboard shortcuts and want a minimal viewer with no toolbars on screen.
Signing a PDF usually doesn't need an upgrade
Here's the part people get wrong. Adobe's own page for Adobe Acrobat Reader says you can view, share, sign, leave comments and collaborate on PDFs for free on Windows, Mac, iOS and Android. Plenty of people buy a subscription just to sign a form, when the free reader's Fill and Sign tool does that job.
Want AI doing the heavy lifting in your marketing?
I build the systems that handle the boring 80 percent, so you get your week back. Done properly, with the human kept in.
Where you do hit a wall is changing the original text, merging files or converting to Word. That's editing, and most readers leave it out. So decide whether you're reading and signing, or rewriting, before you spend anything.
What to check in a free PDF reader
- Speed: how quickly does it open a big file?
- Forms: can you fill in interactive forms and save them?
- Signatures: can you add a typed, drawn or image signature?
- Search: does search work across the whole document?
- Extras: does it add ads, bundled apps or account sign-ups you don't want?
How to fill and sign a PDF form
- Save the form to your computer before you start, rather than filling it in a preview.
- Open it in your reader and click into each field to type.
- Add your signature with the sign or markup tool.
- Save a new copy with a clear name, such as the date and form name.
- Open the saved copy to check your answers and signature are still there.
Little PDF habits that save time
- Name files clearly. Date first, then the subject, so they sort in order.
- Use search, not scrolling. Ctrl or Command plus F finds anything in seconds.
- Print to PDF. It's the quickest way to save a web page or receipt.
- Keep one default reader. Too many apps fighting over PDFs gets confusing.
If you're trying to cut down on fiddly admin generally, my guide on finding productivity tools that save time is a good next read.
Do you make PDF tools? Tool makers can ask to be considered for a featured place on this list.
My plain advice on free PDF readers
Use what's already on your computer for everyday reading, and only install another reader if you need forms, comments or speed. A browser handles most PDFs perfectly well.
And always reopen a signed form before you send it. Some forms lose filled-in answers when they're saved the wrong way, and it's far easier to spot that before the email goes.
Frequently asked questions
What is a PDF reader?
It's an app that opens and displays PDF files so you can read, search, print and often mark them up.
Can I sign a PDF with a free reader?
Yes. Many free readers include a signing tool, so you can add a typed or drawn signature without paying.
Is a browser good enough for PDFs?
For reading and printing, usually yes. Dedicated readers add better form handling and annotation tools.
Why won't my PDF form save my answers?
Some forms need to be saved as a new copy. Save to your computer first, fill it in, then save a fresh copy.
Can a PDF reader edit text?
Most readers can't change existing text. You'll need a PDF editor for that.
Which free PDF reader is fastest?
Small, single-purpose viewers usually open files quickest, especially on older computers.
Are free PDF readers safe?
Download them from the maker's own site and keep them updated, as PDFs can carry risky links and scripts like any file.
Can I read PDFs on my phone for free?
Yes. Several readers have free mobile apps, and phones can open PDFs in the built-in viewer too.
