pdf24 set PDF viewer preferences: choose how your PDF opens

Yes. pdf24 set PDF viewer preferences on pdf24tools costs nothing, needs no sign-up and adds no watermark. There is no limit on files, because the settings are written in your own browser instead of on a server. Each run produces a normal PDF that you can keep and share.

The settings are part of the PDF standard, ISO 32000, and desktop readers such as Adobe Acrobat Reader apply them when the file opens. Browser viewers and many phone apps may ignore some or all of them and use their own layout. Test the result in the reader your audience will use.

Only its opening settings. Pages, text, images, links, form fields and document info are copied unchanged; our 6-page test file kept its 13,806 characters and a file with author, keywords and XMP kept all of them. The one addition: with Show the document title on, an untitled file gets its file name as title.

Choose Full screen under Side panel and, for slides, One page at a time under Page layout. Save and open the file in a desktop reader: it starts in full-screen mode. Acrobat Reader may ask for confirmation the first time, as a safety step against documents that take over the screen.

It is the TwoPageRight layout: page 1 is shown by itself on the right, and the following pages appear as spreads 2–3, 4–5 and so on, like an open book or magazine. Odd pages left, the TwoPageLeft layout, instead pairs page 1 with page 2 from the start.

No. The PDF is read with the browser File API and the catalog entries are written in memory on your device. The result line shows 0 bytes uploaded, nothing is stored, and closing the tab removes every trace. You can load the page and then work offline as well.

Yes, you can set them from Safari on iPhone and iPad or from Chrome, Edge and Firefox on Android, and saving takes a fraction of a second. Keep in mind that phone PDF apps often ignore page layout and panel settings; the preferences pay off when the file is opened on a computer.

No. Hiding the toolbar and menu bar only changes what the reader shows; keyboard shortcuts and other readers still print and copy. To limit printing, copying or editing, use Secure PDF, which encrypts the file with AES-256 and sets permission flags that compliant readers enforce.

The tool sets Resize the window to fit the first page, which makes the reader window match the page size when the file opens. It does not store a fixed zoom percentage such as 125 %. Most readers fit the page into the window, so the page appears fully visible at first.

No. pdf24tools is an independent website and is not affiliated with PDF24 or Geek Software GmbH. Our tool is our own build on the open-source pdf-lib library and runs entirely in your browser. The page name only describes what people search for when they want to control how a PDF opens.

Yes. Run the tool again on the new file and pick other values, for example continuous scrolling, No panel and all window options unticked. Keep as it is leaves the layout or panel entry untouched instead. Your original file is never changed, because the tool always saves a new copy named -prefs.pdf.

Some editors and converters rebuild the PDF catalog when they save and drop entries they do not know or use. Make viewer preferences one of the last steps: merge, edit, sign and compress first, set the preferences, and if the file goes online, web-optimize it as the very last step.