Why it's a strong pick

Enhanced PDF Viewer adds reading and printing features on top of PDF.js, the engine Firefox uses for PDFs. The listing, titled "Enhanced PDF Viewer by PlugMonkey", names keyboard shortcuts, a presentation mode, text-to-speech and print options. It is a reader, not an editor or converter. One caution: the evidence we found about this extension comes from the Chrome Web Store listing and sources tied to its maker, so treat our notes as light.

What it does

It opens PDFs in a viewer built on PDF.js, according to the listing. The listing describes keyboard shortcuts for moving through a document, a theater or fullscreen presentation mode, text-to-speech, and smart printing with a page range and DPI choice. It also lists a custom filename when you download.

Key features

PDF.js engine. The maker says it uses the same PDF.js engine as Firefox.
Keyboard shortcuts. The listing names Ctrl+Page Up and Page Down, Ctrl+Home and End, number keys and Ctrl+Shift+R to rotate.
Presentation mode. Theater or fullscreen reading.
Text-to-speech. Listed on the store page.
Smart print. Choose a page range and DPI.
Custom filename. Set the name when you download.

Who it's for

It suits people who read long PDFs in Chrome and like keyboard control, or who present from a PDF. It is not for converting, compressing or merging files. For tools like those, see Smallpdf or iLovePDF. If you want the plain, official PDF.js viewer instead, see PDF Viewer by Mozilla PDF.js.

Is Enhanced PDF Viewer built on PDF.js?

Yes, according to the store listing, which says it uses the same PDF.js engine as Firefox. PDF.js is Mozilla's open-source PDF renderer. This extension is a separate product from the one made by Mozilla. Our page for PDF Viewer by Mozilla PDF.js covers the official viewer.

Does Enhanced PDF Viewer keep my files private?

The maker's own site says it does no uploading and no cloud sync. We could not verify this from a source independent of the maker, so treat it as the maker's claim, not our finding. We also did not read the full store text. Check the listing and its privacy information yourself before you open sensitive files.

What permissions does Enhanced PDF Viewer ask for?

We could not confirm a permission list. Check the install prompt on the Chrome Web Store before you add it. Chrome shows what the extension can access. A viewer that handles every PDF you open is worth a careful look at that list, and permissions can change with updates.

FAQ

Who makes it? The listing names PlugMonkey.

Can it edit or convert PDFs? Not per the listing. It is a reader. See the PDF tools category for tools that do.

Does it use a PDF.js engine? Yes, per the maker.

Good to know

It is a reader with a few extras, not a converter or editor. Also, the most detailed praise we found for it appears on a site tied to its maker, so we did not use that site as an independent source. We relied on the store listing. If privacy is your main goal, the plain PDF.js viewer is easier to check.

Other pdf viewers & editors to compare

Enhanced PDF Viewer is one of 7 picks in our PDF Viewers & Editors guide, which compares them side by side and explains how to choose. The other picks:

PDF Viewer by Mozilla PDF.js: An open-source extension that opens PDFs in the PDF.js viewer instead of Chrome's built-in one.
Adobe Acrobat: Adobe's own Chrome extension. Free to view, comment, fill and sign. Convert and compress tools need a paid plan or trial.
Smallpdf: A "Smallpdf Tools" tab for every PDF you open in Chrome. Compress, convert, merge, split, e-sign and AI summarize. The free tier has a daily task limit.
iLovePDF: PDF tools from ILOVEPDF S.L., the company behind ilovepdf.com. Merge, split, compress, convert, protect, sign and OCR.
Xodo: Online PDF tools from Xodo, part of Apryse. Edit, convert, compress, merge, redact and sign. Free use is limited per day.
Kami: A PDF and document annotation tool for classrooms. The Chrome extension is free, with basic markup tools and Google Classroom support. Some tools are paid.