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PDF Viewer Preferences

Set the opening page, zoom, page layout, side panel, full screen and toolbar options.

Free, no uploads, no sign-up. Runs 100% in your browser.

How PDF Viewer Preferences works

Writes the catalog page layout, page mode, open action and viewer preferences dictionary with pdf-lib. Readers apply them when the file opens.

Input: PDF. Output: PDF.

How to use PDF Viewer Preferences

1. Drop your PDF onto the PDF Viewer Preferences area, or click to choose it.
2. Wait a moment while page thumbnails render locally.
3. Choose the pages and options you need. Previews update as you go.
4. Press the main action button and download the finished PDF.

Tips

• Encrypted PDFs must be unlocked first with Unlock PDF.
• Large scanned PDFs are mostly images. Compress PDF shrinks them the most.
• Your original file is never modified; you always download a new copy.

PDF Viewer Preferences FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

Related tools

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• Merge PDF: Combine multiple PDFs into one ordered document with drag-and-drop sorting.
• Split PDF: Split by ranges, every N pages, or extract each page into a ZIP.