Is Viewer preferences free to use?

Yes. This tool is available for free with no account required for basic usage.

Are files secure when using Viewer preferences?

Uploaded files are processed temporarily and automatically removed after one hour.

How do I get the best result with Viewer preferences?

Use clean source files and review output after processing, especially for complex viewer preferences workflows.

Do I need an account or signup?

No. PDFBaba does not require signup for these tools. Upload, process, and download without creating an account.

Is there a watermark on the output?

Output from this tool is not watermarked by PDFBaba. You get a clean file suitable for work and sharing.

What is the maximum file upload size?

The default limit is 100MB per file on the server. Your host or administrator can change this via environment configuration. If a file fails to upload, try compressing or splitting it first.

Can I use this tool on my phone or tablet?

Yes. PDFBaba works in modern mobile browsers. Very large files or complex previews may be smoother on a desktop with a stable connection.

Is there a daily usage limit?

To keep the service fast for everyone, rate limits may apply per IP. Typical personal use is rarely affected. If you hit a limit, wait briefly and try again.

What if my PDF is password-protected?

For Viewer preferences, use an unlocked PDF when possible. If the file asks for a password in a reader, unlock it with our Unlock PDF tool first, then run Viewer preferences on the decrypted file.

Online PDF Tool

Viewer preferences

Control toolbar, window, duplex, and other PDF open behavior via JSON.

Why use Viewer preferences?

Default open behavior matters for kiosk PDFs, portfolios, and training packets. Viewer preferences JSON can hide toolbars, center windows, or hint duplex printing—depending on reader support. PDFBaba applies preferences without signup, with short file retention. Test in Acrobat, Edge, and any critical readers your audience uses because implementations differ.

Supported files & limits

One PDF plus JSON viewer preferences. The default upload limit is 100MB per file; administrators can raise or lower this via server configuration. Affects how many readers open the file by default.

Privacy & data retention

PDFBaba is built for quick tasks: your uploads and generated downloads are kept only long enough to process your request and are automatically deleted after about one hour. We do not require signup for these tools, and we do not use your documents to train AI models. For full details on cookies, analytics, and legal terms, read our Privacy Policy.

Features

JSON viewer preferences

Fit/center window

Print-related flags

How to use

1
Upload your source file.
2
Click set viewer preferences to process the document.
3
Download the output file.