Windows has one genuinely useful built-in PDF feature — the “Microsoft Print to PDF” printer — and Microsoft Edge is a capable PDF reader. But there’s no built-in way to compress a PDF, merge several into one, or convert a PDF back to Word. This guide shows what Windows can do on its own, and how to handle the rest in your browser, with nothing to download.
What Windows can do with PDFs on its own
- Make a PDF from almost anything — in any app, press Ctrl+P and choose the Microsoft Print to PDF printer. Great for turning a web page, image, or document into a PDF.
- Read and annotate — Microsoft Edge opens PDFs, lets you highlight, draw with ink, and fill in form fields, then save.
- Save web pages — Edge and Chrome both offer Print → Save as PDF.
What Windows has no built-in tool for: compressing a PDF, merging several into one, splitting one apart, converting a PDF to editable Word or Excel, or running OCR on a scan. That’s where the browser comes in.
How to compress, merge or convert a PDF on Windows
- Open ream.pro in Edge, Chrome, or Firefox and choose your tool — e.g. Compress PDF.
- Drop in your PDF and pick your options.
- Download — the file lands in your Downloads folder, ready in File Explorer.
Tools that only rearrange a PDF — merge, organize, sign, rotate — run on your PC in the browser, so the file never leaves your computer. The heavier ones — compress, convert, OCR — run in Ream’s network-isolated sandbox and are deleted immediately. Here’s how that split works.
Print to PDF vs. a real converter
“Microsoft Print to PDF” is excellent for creating a PDF from something printable, but it’s a dead end for editing one. Printing a PDF back to PDF won’t meaningfully shrink it, and it flattens everything to a picture — you lose selectable text. To actually reduce file size, use Compress PDF; to get an editable document back, use PDF to Word. If you’re starting from a Word file, Word to PDF gives a cleaner result than Print to PDF.
File too big to email? Windows won’t shrink it, but Compress PDF will — see how to hit a specific size target. Need to combine scanned pages? Merge PDF handles it in the browser.
Is it private, and is it free?
Yes to both — no account, no watermark, nothing to install. The browser tools keep your file on your PC; the sandbox tools wipe it immediately after. It’s the same toolkit you’d use on a Mac, an iPhone or iPad, or an Android phone.
Frequently asked questions
How do I compress a PDF on Windows 10 or 11? Windows has no built-in compressor — open Compress PDF in your browser, add the file, and download the smaller version.
How do I merge PDFs on Windows for free? Use Merge PDF in Edge or Chrome — add your files, arrange them in a visual grid, and download the combined PDF.
Does Microsoft Print to PDF reduce file size? No — it’s for creating PDFs, not shrinking them, and printing a PDF back to PDF loses selectable text. Use Compress PDF instead.
How do I convert a PDF to Word on Windows? Use PDF to Word, which rebuilds text and tables as an editable .docx — Windows can’t do this natively.
Can I edit a PDF in Microsoft Edge? Edge can highlight, ink, and fill forms, but not merge, compress, or convert. For those, use the browser tools above.
Do I need to install software? No — everything runs in your browser on Windows.
Is it free? Yes — free, no sign-up, and no watermark.
Windows creates and reads PDFs well, but the editing gaps — compressing, merging, converting, OCR — are filled in the browser with no install. And the same tools follow you to your Mac, iPhone, and Android.
