PDF Viewer
Open and read any PDF in your browser — thumbnails, full-text search, and zoom. Files never leave your device.
How It Works
Open your PDF
Drop in any PDF or click to browse. The document opens instantly in the browser viewer.
Navigate and search
Zoom in/out, jump to any page, and use full-text search to find content anywhere in the document.
Use additional tools
From the viewer, launch any SynthPDF tool — compress, annotate, split, or download directly.
Why SynthPDF?
No install required
Runs in any modern browser using PDF.js. No plugins, no extensions, no download.
Full-text search
Find any word or phrase in the document instantly with Ctrl+F / Cmd+F search.
Completely private
Viewer renders locally — no file data is sent to any server.
Mobile-optimised
Pinch to zoom, swipe to change pages — works perfectly on iPhone and Android.
Instant rendering
Pages render as you scroll — no waiting for the entire document to load before you can start reading.
One click to other tools
Open a document in the viewer and launch Compress, Annotate, or Split with a single click.
Frequently Asked Questions
No. The PDF viewer runs entirely in your browser using PDF.js. No plugins, no extensions, no downloads required.
Yes — the viewer is mobile-optimised with touch-friendly zoom and page swiping.
Yes — press Ctrl+F (or Cmd+F on Mac) to open the search bar and find any text in the document.
No. The viewer renders the PDF locally in your browser. Your file never leaves your device.
Yes — you'll be prompted to enter the password before the document opens.