How does PDFAI protect PDF file privacy?
Core PDF processing uses JavaScript and WebAssembly in the browser. The selected file is read by the current page, processed in device memory, and downloaded directly by the browser. Users should still check the processing note on a specific tool before handling sensitive documents.
MDN explains that the File API lets web applications read files explicitly provided by users through a file picker or drag and drop. MDN File API
What PDF tasks can PDFAI perform?
PDFAI organizes common PDF workflows into six categories, with a stable, shareable page for each tool.
- Organize: Merge, split, rotate, crop, delete, and reorder pages.
- Edit: Add annotations, watermarks, page numbers, signatures, and form content.
- Convert: Convert between PDF, image, Office, and ebook formats.
- Optimize: Compress, repair, OCR, deskew, and resize pages.
- Secure: Encrypt, decrypt, redact, and remove hidden data.
How do I start processing a PDF?
Most tools follow the steps below. Large files require more browser memory and processing time.
- Search for a task or browse the tool categories.
- Open a tool and select a local file.
- Choose the page range or output settings.
- Process the file and download the result.
- Keep the original before editing an important document.
PDFAI at a glance
As of August 2026, PDFAI provides 131 PDF tools across 6 categories and 14 localized versions. The base price is $0, and no account is required for supported browser-based tools.
- PDF tools
- 131
- tool categories
- 6
- localized versions
- 14
- base price
- $0
How many tools are in each category?
| Category | Available tools | Examples |
|---|---|---|
| Organize & Manage | 32 | Merge, split, rotate |
| Edit & Annotate | 26 | Edit, watermark, sign |
| Convert to PDF | 23 | Image, Word, Excel |
| Convert from PDF | 21 | JPG, DOCX, Excel |
| Optimize & Repair | 16 | Compress, repair, OCR |
| PDF Security | 13 | Encrypt, redact, sanitize |
Technical references
PDFAI relies on standard browser capabilities for local file processing. Technical background is available from these primary references:
“The File API enables web applications to access files and their contents.”
“WebAssembly describes a memory-safe, sandboxed execution environment.”
The PDF Association specification archive identifies ISO 32000-2:2020, published in December 2020, as the current PDF 2.0 specification. PDF Specification Archive