Frequently Asked Questions

SmartAssPDF is a modern, lightweight, privacy-focused online document processing suite. It provides 24+ essential PDF utilities including Mobile Scan to PDF with automatic 4-corner document detection, OCR PDF, document conversion (Word, Excel, JPG, PowerPoint), merging, splitting, compression, page rotation, and client-side encryption.

No. All tools on SmartAssPDF are 100% free forever with zero paywalls, credit cards, or hidden limits. You can process as many documents as you need without purchasing subscriptions.

No account or login is required. We do not collect email addresses, passwords, or personal credentials. You can access every tool immediately from any device.

SmartAssPDF runs directly inside any modern web browser on Windows, macOS, Linux, iOS (iPhone & iPad), and Android. No software downloads or desktop installations are required.

The Scan to PDF tool utilizes real-time client-side OpenCV computer vision algorithms. When you point your camera at a document, receipt, or book, it tracks high-contrast geometric contours, performs Hough edge verification, and locks onto the four document corners. When held steady for 1.0s, it automatically captures the frame and corrects perspective distortion.

OCR (Optical Character Recognition) converts scanned paper photos and image-based PDFs into fully searchable documents. It generates an invisible, selectable text layer aligned with the visual characters, allowing you to highlight, search (Ctrl+F), and copy text from scanned PDFs.

Yes. After scanning pages, our multi-page sequencer displays compact page thumbnails. You can tap any thumbnail to open full-screen 4-corner re-cropping, apply document filters (Magic Color, B&W, Grayscale), rotate pages 90°, duplicate pages, or delete pages from the 3-dots menu before compiling the PDF.

SmartAssPDF supports bi-directional conversion between PDF, Microsoft Word (.docx), Microsoft Excel (.xlsx), Microsoft PowerPoint (.pptx), Images (.jpg, .jpeg, .png, .webp), and HTML web documents.

Yes. Our backend conversion engine reconstructs paragraph hierarchies, typography, table cells, alignments, and embedded graphics into native editable Office elements with high visual fidelity.

Image to WebP converts standard JPG and PNG images into the modern next-generation WebP image format, reducing file size by up to 70% while preserving sharpness and transparency for faster web loading.

Open the Merge PDF tool, upload up to 20 PDF files, drag and drop the files into your desired sequential order, and click "Merge PDF". The combined document will be generated instantly.

Yes. The Split PDF tool allows you to extract custom page ranges (e.g. 1-3, 5, 8-10) into separate documents, while the Remove Pages tool permanently deletes specific pages (e.g. 2, 4-6) and outputs a clean PDF.

The Compare PDFs tool analyzes text structures, modifications, and layout variations between two PDF versions, displaying changes side-by-side with clear visual difference indicators.

No. All uploaded documents are processed in isolated, sandboxed temporary directories and are permanently deleted after 30 minutes by an automated cron cleanup daemon. SmartAssPDF maintains zero permanent document storage.

The maximum individual file limit is 50 MB. Multi-file tools support up to 20 files per request.

Sanitize PDF scrubs hidden metadata, author names, creation dates, edit histories, GPS coordinates, JavaScript code, attachments, and embedded annotations to prevent accidental data leaks before public sharing.

Yes. The Protect PDF tool applies industry-standard 256-bit AES encryption to lock documents with user passwords, while the Unlock PDF tool removes encryption restrictions from PDFs you own.

Yes. The Sign PDF tool provides an interactive signature pad where you can draw your signature, type it, or upload a signature image and position it securely anywhere on your PDF.