Is Enhanced PDF Viewer really free?

Yes — free forever, with every feature included. There is no premium tier, no upgrade prompts, no limited free trial, and no feature gating. The extension is published as a brand-surface tool, not a conversion funnel. PlugMonkey makes money on other extensions; this one is here so you have a better PDF reader.

What does it do that Chrome's built-in PDF viewer can't?

Chrome's built-in viewer covers basic display, text selection, search, and print. Enhanced PDF Viewer keeps all of that and adds keyboard shortcuts for power users, presentation/theater modes, text-to-speech for hands-free reading or accessibility, annotations (highlights, comments, sticky notes, freehand sketches), dark and high-contrast themes, smart zoom cycling, reading progress tracking, professional print options with DPI and page-range control, and touch gestures for trackpads and tablets.

Is my PDF data private?

Yes. The extension uses Mozilla's PDF.js engine to render every PDF entirely inside your browser. No file content is uploaded, no metadata is transmitted, no server-side processing happens at any point. You can verify this by opening Chrome's network panel while reading a PDF — there are zero outbound requests related to your document.

Does it work with password-protected or encrypted PDFs?

Yes. Password-protected PDFs prompt for the password when opened, and the decryption happens locally via PDF.js. Encrypted PDFs that allow viewing with a password work normally. PDFs with DRM restrictions on copying or printing follow the document's own permission flags.

Will it handle large PDFs without slowing down my browser?

Yes — Enhanced PDF Viewer uses progressive rendering, smart caching, and background memory cleanup to handle large documents (500+ pages) smoothly. Pages render as you scroll rather than all at once, and the thumbnail sidebar lazy-loads previews so the initial load stays fast.

Does it replace Chrome's built-in viewer automatically?

Yes. After installation, Chrome will route PDFs through Enhanced PDF Viewer by default. You can opt back into Chrome's built-in viewer for a single document by right-clicking the toolbar icon, or disable the extension entirely via chrome://extensions.

Can I annotate PDFs and save the annotations?

You can highlight text, add comments and sticky notes, and draw freehand sketches while reading. Annotations persist within the session and can be printed or exported as part of the document. For permanent storage across sessions, you'll need to download the annotated copy — full long-term annotation persistence is on the roadmap.

Does it work offline?

Yes. Once the extension is installed, it works completely offline. There is no login step, no remote configuration fetch, no telemetry call — the entire reader runs from the bundle Chrome installed on your machine.

What about accessibility?

Enhanced PDF Viewer includes built-in text-to-speech for hands-free review, high-contrast theme options, large touch-friendly hit targets, and works alongside screen readers thanks to PDF.js's semantic markup for headings, lists, and tables. Keyboard shortcuts cover every primary action so the viewer is fully usable without a mouse.

Is it open source? What about the PDF.js attribution?

The extension itself is proprietary, but it's built on top of Mozilla Foundation's PDF.js engine which is open source under the Apache License 2.0. Full attribution and license terms are linked from the extension's About panel. PlugMonkey is an independent publisher with no affiliation to Mozilla.

Free Forever • Built on Mozilla PDF.js

Enhanced PDF Viewer — Professional PDF Reader for Chrome

Replace Chrome's basic PDF viewer with a full-featured reader built on Mozilla's PDF.js engine. Keyboard shortcuts, presentation mode, text-to-speech, annotations, dark mode, and smart printing — all 100% local. Free forever, no upgrades, no accounts.

Install Free

Keyboard Shortcuts

Navigate documents at speed — Ctrl+Page Up/Down for page flipping, Ctrl+Home/End to jump, number keys for direct page access, Ctrl+Shift+R to rotate, and smart zoom cycling between fit modes.

Annotations & Markup

Highlight text, add comments and sticky notes, draw freehand sketches, and pick from multiple color options. Markup that travels with the document.

100% Local Processing

Every PDF is rendered in your browser using Mozilla's PDF.js engine. Nothing is uploaded, nothing is transmitted, nothing leaves your machine.

What Enhanced PDF Viewer Gets You

Keyboard-First Navigation

Built for power users who want to fly through documents without touching the mouse. Every common action has a keyboard shortcut, and you can use number keys to jump directly to specific pages.

Ctrl+Page Up / Ctrl+Page Down for page flipping
Ctrl+Home / Ctrl+End to jump to start or finish
Number keys for direct page access
Ctrl+Shift+R to rotate the current page
Smart zoom cycling between fit-to-page, fit-to-width, and actual size

Presentation & Theater Mode

Switch into theater mode with elegant overlays or full-screen presentation mode for maximum screen space. Click or arrow-key navigation, Home/End for instant positioning across long documents.

Theater mode with minimal chrome
True fullscreen presentation mode
Click or arrow-key navigation
Home/End for instant first/last page jumps

Text-to-Speech & Accessibility

Built-in voice synthesis reads documents aloud for hands-free review, proofreading, or accessibility. High-contrast themes and large hit targets make the viewer comfortable for every reader.

Built-in TTS using the Web Speech API
High-contrast theme options
Touch-friendly hit targets
Compatible with screen readers via PDF.js semantic markup

Annotations, Highlights & Sketches

Mark up PDFs without leaving your browser. Highlight passages in multiple colors, add inline comments and sticky notes, and draw freehand sketches for diagrams or signatures.

Multi-color text highlighting
Inline comments and sticky notes
Freehand drawing for sketches and signatures
Annotations persist with the document during the session

Theme System & Smart Zoom

Light, dark, or system-matched themes adapt to your environment. Smart zoom cycles between three sensible fit modes so you always have the right view for the content in front of you.

Light, dark, and system-matched themes
High-contrast modes for accessibility
Smart zoom: fit-to-page, fit-to-width, actual size
Per-document zoom memory

Professional Print & Smart Downloads

Take control of the print and download flow. Pick page ranges, choose orientation, set DPI quality (150 draft / 300 professional), and rename the output file with custom formatting.

Page range selection (e.g., 1-5, 8, 12-15)
Portrait or landscape orientation
DPI quality: 150 (draft) or 300 (professional)
Color or grayscale output
Custom filename formatting with protocol validation

Local Processing & Privacy Architecture

Every PDF is rendered inside your browser using Mozilla's PDF.js engine. No file is ever uploaded, no metadata is transmitted, no server-side processing happens. The extension cannot phone home because there is no home to phone.

Built on PDF.js by Mozilla Foundation (Apache 2.0)
Zero network calls during PDF rendering
No accounts, no telemetry, no tracking
Works completely offline once installed

How Enhanced PDF Viewer Works

Get started in minutes with our simple process

Install the Extension

Add Enhanced PDF Viewer to Chrome with a single click. No account, no registration, no payment.

Open Any PDF

Open any PDF in Chrome — local file or web URL. The extension automatically replaces Chrome's default viewer with the enhanced reader.

Navigate with Shortcuts

Use Ctrl+Page Up/Down to flip pages, number keys to jump directly to a page, and Ctrl+Shift+R to rotate. Smart zoom cycles through fit modes with a single keystroke.

Annotate, Read Aloud, or Present

Highlight text, add comments, sketch on the page. Use text-to-speech for hands-free review. Switch into theater or fullscreen presentation mode when you need maximum screen space.

Who Uses Enhanced PDF Viewer?

Trusted by thousands of professionals

Students Highlighting Textbooks

Annotate course readings and research papers with highlights, comments, and color coding. Smart zoom and theme options make long study sessions easier on the eyes.

Legal Professionals Reviewing Contracts

Navigate multi-page contracts at speed with keyboard shortcuts, mark up key clauses with highlights and sticky notes, and print page ranges with professional DPI settings.

Developers Reading Technical Documentation

Move through long API docs and engineering specs without touching the mouse. Dark mode reduces eye strain during long reading sessions; presentation mode is perfect for code reviews from PDF specs.

Business Professionals Presenting Reports

Switch into theater or fullscreen presentation mode for client meetings. Keyboard navigation keeps you focused on the content, not the toolbar.

Accessibility Users

Text-to-speech reads documents aloud for hands-free review. High-contrast themes and large hit targets make the viewer comfortable for users with low vision or motor limitations.

What Enhanced PDF Viewer Users Say

Join thousands of users who trust PlugMonkey tools.

I read a lot of legal contracts and academic papers. The keyboard shortcuts alone are worth installing — Ctrl+Page Up/Down for flipping, number keys to jump to a specific page. Beats clicking around in Chrome's built-in viewer every time.

Daniel R.

Corporate paralegal at a tech company

Dark mode on PDFs is the feature I didn't know I needed. I read technical specs and engineering documentation at night, and this saves my eyes. The presentation mode is great for code reviews from PDFs too.

Karen L.

Senior software engineer

I use the text-to-speech for proofreading my own writing — hearing it out loud catches mistakes my eyes skip over. Plus zero tracking and zero account hassle. Just an extension that does what extensions should do.

Marcus T.

Independent author and editor

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Frequently Asked Questions

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Replace Chrome's Basic PDF Viewer

Install Enhanced PDF Viewer for keyboard shortcuts, annotations, dark mode, text-to-speech, and presentation mode — free forever

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