PDFViewerFree PDF viewer for Windows 10 and 11, no install
This PDF viewer for Windows 10 and 11 runs inside Edge, Chrome or Firefox, so it works on a locked-down work PC where you cannot install anything. It opens the file locally and adds annotation, OCR, unlocking and merging on top of plain viewing.
What you can do with a PDF on Windows here
Windows already opens PDFs in Edge, and many PCs also carry Adobe Acrobat Reader. Edge is fine for reading but thin on editing. Acrobat Reader is a large install that nags about upgrades and that many IT departments block. A PDF viewer that is a web page sidesteps both problems: there is nothing to install, nothing to update, and it runs the same on a company laptop, a school PC and your own desktop.
That is the whole pitch: open the viewer online, drop the file, do the job, download the result. No admin rights required.
- View: open by drag-and-drop or the file picker, scroll with page thumbnails, zoom, drag the page with the hand tool, search text with next and previous match, switch to dark mode, check document properties.
- Annotate: highlight in yellow, green, blue, red, orange, purple or black; draw freehand; add text; insert a PNG or JPG; draw and place a signature; add a sticker; whiteout a box over content; erase any annotation; undo and redo with Ctrl+Z and Ctrl+Y.
- Pages: rotate 90 degrees, delete pages, reorder by dragging thumbnails, add a blank page at the end, append another PDF to merge.
- OCR: make a scanned PDF searchable by recognizing the text in the browser and adding an invisible text layer.
- Unlock: strip owner-password restrictions on printing, copying and editing from a PDF that opens normally.
- Save: Download writes a new PDF with everything embedded, including Unicode text such as Cyrillic.
Privacy on a work PC: nothing is uploaded
The document is read by JavaScript in the browser tab. Edits, OCR and the final save all happen on the PC; no server receives the file. When you close the tab, the browser lets go of it. The OCR engine and its language data come from a CDN once, which is the only network activity, and that download contains no part of your document.
On a work machine this is the difference between "I used a web viewer" and "I uploaded the client's contract to a third party." Medical, legal and HR files often fall under policies that forbid the second. If your company restricts outbound uploads, a local-processing viewer is the one that still works.
How to edit a PDF on Windows in three steps
- Open. Drag the PDF from File Explorer onto the drop zone, or click it and pick the file in the standard Windows open dialog. OneDrive folders show up there like any other folder.
- Edit. Use the toolbar: Highlight, Draw, Text, Image, Signature, Sticker, Whiteout, Eraser, OCR, Remove Restrictions, Merge. The thumbnail sidebar handles rotate, delete and reorder.
- Save. Click Download. Edge and Chrome put the new file in your Downloads folder by default, or ask where to save if you set them to. The original is not modified.
Windows specifics: Edge, Chrome, printing, downloads
Edge, Chrome and Firefox on Windows 10 and 11 are all supported. If Edge is your default PDF handler, PDF links still open in Edge's own viewer; to use this one, open the page and drop the file, or use the Chrome extension so web PDF links open here. Printing goes through the browser's print dialog, which lists your printers and Microsoft Print to PDF. Keyboard search is Ctrl+F inside the viewer.
Touch works on a Surface or any touch laptop for highlighting and drawing, and a stylus is a comfortable way to sign.
Limits you should know
A PDF that asks for a password to open cannot be opened here; you see a "This PDF is password-protected" notice and need to remove the password elsewhere first, as explained in remove a password from a PDF. Fillable forms show their fields but you cannot type into them as fields; add text on top. There is no conversion to Word, Excel or images and no compression. Existing text cannot be rewritten, only covered with whiteout and replaced by new text. Huge scans in the hundreds of pages can run slowly because everything is rendered in browser memory.
Edge vs Acrobat Reader vs this viewer on Windows
| Task | Microsoft Edge | Acrobat Reader | PDF Viewer in browser |
|---|---|---|---|
| Install / admin rights | Built in | Installer, often blocked by IT | None |
| Highlight and draw | Yes | Yes | Yes, plus text, image, sticker, whiteout |
| Sign | Draw only | Fill and Sign | Draw and place |
| OCR | No | Paid tier | Yes, local |
| Remove restrictions | No | No | Yes, if the file opens |
| Delete, rotate, reorder, merge | Rotate only | Paid tier | Yes |
| Fill form fields | Yes | Yes | No |
| File location | Local | Local, cloud optional | Local, in the tab |
Frequently asked questions
What is the best free PDF viewer for Windows 10?
For reading, Edge is already there. For editing without installing anything, a browser viewer like this one adds annotation, OCR, unlocking and page tools and leaves the file on your PC.
Does it work on Windows 11?
Yes. Anything that runs Edge, Chrome or Firefox on Windows 11 runs the viewer.
Can I use it on a work computer without admin rights?
Yes. It is a web page, so nothing is installed and no administrator approval is needed.
How do I edit a PDF on Windows without Adobe?
Open the PDF here, use Highlight, Text, Signature, Whiteout or the page tools, then click Download for a new PDF. Adobe is not involved.
Is it safe to open confidential PDFs in it?
The PDF is processed inside your browser and never uploaded. Only the OCR engine is downloaded, and only once.
Can it open a password-protected PDF?
No. If a password is needed to open the file, remove it in another tool first. If the file opens but blocks printing or copying, Remove Restrictions handles that.