Is PDF在线预览 free? Do I need to register?

Yes, it's completely free. No registration required for most tools. Tools that store personal data (e.g., favorites, conversion history) optionally support login for cross-device sync.

Do I need to install anything to use PDF在线预览?

No installation needed. Open the web page and use directly. Works in all modern browsers (Chrome, Edge, Firefox, Safari) on both desktop and mobile.

Is my data safe when using PDF在线预览?

Tools marked "browser-local / no upload" process your files entirely on your device. Server-side tools (e.g., PDF conversion) delete temporary files immediately after processing — no persistent storage.

Are there daily usage limits on PDF在线预览?

Most pure-frontend tools are unlimited. Tools that consume server resources (format conversion, OCR) have a free daily quota; logging in gives you a higher quota. Check "Remaining today" at the top of the tool page for details.

PDF在线预览

Click or drag file to this area to upload

Do not upload sensitive data like bank card numbers, passwords, or credit card details

✨ Features

• Preview PDF online • View without downloading • Support zoom and pagination • Privacy protected locally

📖 How to Use

Step 1

Upload or drag PDF

Step 2

Use toolbar to navigate

Step 3

Close when done

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PDF在线预览

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