PDFWhisk

About PDFWhisk

PDFWhisk is a collection of free, browser-based PDF tools built with privacy as the core principle. Every operation runs entirely in your web browser — your files are never uploaded to any server.

Why We Built This

Most online PDF tools require you to upload sensitive documents to their servers. Your contracts, tax returns, medical records, and business documents pass through third-party infrastructure where they could be stored, analyzed, or breached.

We believe that shouldn't be necessary. Modern browsers are powerful enough to handle PDF processing locally. PDFWhisk leverages JavaScript libraries like PDF-lib and PDF.js to perform all operations on your device, using your device's processing power.

How It Works

When you drop a file into PDFWhisk, it stays in your browser's memory. JavaScript processes the file, produces the result, and offers it for download. At no point does any data leave your device. We don't have servers capable of processing files — by design.

Our Tools

  • Compress PDF — Reduce PDF file size without losing quality
  • Merge PDF — Combine multiple PDF files into one document
  • Split PDF — Extract pages or split a PDF into multiple files
  • Rotate PDF — Rotate PDF pages 90, 180, or 270 degrees
  • PDF to JPG — Convert PDF pages to high-quality JPG images
  • PDF to PNG — Convert PDF pages to lossless PNG images
  • JPG to PDF — Convert images to a PDF document
  • Delete Pages — Remove unwanted pages from a PDF
  • Reorder Pages — Drag and drop to rearrange PDF pages
  • Add Page Numbers — Add page numbers to your PDF document
  • Watermark PDF — Add text watermarks to your PDF
  • Protect PDF — Add password protection to your PDF
  • Unlock PDF — Remove password from a PDF you own
  • PDF to Text — Extract all text content from a PDF
  • Sign PDF — Draw or upload your signature onto a PDF

Editorial

PDFWhisk is edited by James Whitfield, a writer focused on practical browser-based productivity tools. Content is written to help users accomplish PDF tasks quickly, privately and without needing specialist software.

Technology

PDFWhisk is built with:

  • PDF-lib — creating, modifying, and assembling PDF documents
  • PDF.js (by Mozilla) — rendering PDF pages for preview and conversion
  • HTML5 Canvas — image processing and rendering
  • JSZip — packaging multiple files for download

All libraries run client-side. The web server only delivers the HTML, CSS, and JavaScript files — it never processes your documents.