Process multiple PDFs at once — compress, convert, OCR, watermark, and more
WhiskFile Batch PDF Processing is a professional online tool to process multiple PDFs at once — compress, convert, OCR, watermark, and more. Files are processed entirely in your browser — nothing is uploaded to any server.
Quick Answer
Process multiple PDFs at once — compress, convert, OCR, watermark, and more. WhiskFile's Batch PDF Processing is available with a Pro plan. Your files never leave your device — all processing happens locally.
Upload PDF files
Select or drag & drop multiple PDF files. Upload up to 20 files (Pro) or 100 files (Business).
Choose operation
Select the batch operation: compress, convert, OCR, watermark, rotate, grayscale, resize, or more.
Configure settings
Adjust operation-specific settings like compression level, watermark text, or output format.
Process all
All files are processed in parallel. Track progress for each file individually.
Download results
Download processed files individually or all at once.
Max file size: 50 MB (free) · 500 MB (paid). Processing time: ~30s on average. Batch processing: upload multiple files at once.
Batch PDF Processing runs entirely in your browser — no software to install. Works on any device with a modern browser.
Windows & Mac
Chrome, Firefox, Edge, Safari
iPhone & Android
Safari, Chrome mobile
iPad & Tablets
Full touch support
Unlike server-based tools that upload your documents, WhiskFile processes everything locally in your browser. Your files never leave your device — not even temporarily.
No upload required
Files are processed in your browser — nothing is sent to any server
100% private
No server storage, no data collection, no third-party access
Works offline
Once loaded, works without an internet connection
“Compressed PDFs email in seconds instead of minutes. My clients love the fast turnaround.”
Tom Wilson
Real Estate Agent
“OCR on scanned papers makes them searchable instantly. A massive time-saver for literature reviews.”
Emily Zhang
Academic Researcher
Help us improve by sharing your experience with Batch PDF Processing.
Client-side processing
This tool now runs entirely in your browser — files never leave your device.
Result preview & sharing
Preview your processed file before downloading, and share results via a secure link.
Pro plan: up to 20 files per batch. Business plan: up to 100 files per batch. Free users can process files individually with existing tools.
Compress, convert (PDF to Word/Excel/JPG), OCR, watermark, rotate, grayscale, resize, and more. The list of supported operations is expanding.
Yes. After processing completes, you can download each file individually or use the Download All button to get everything at once.
Failed files are marked with an error message. You can retry failed files individually while downloading successfully processed files.
Yes. Batch PDF Processing on WhiskFile is completely free with no account required. Free users get 7 tasks per day with files up to 50 MB. There are no watermarks on any plan. Pro plans ($4.99/month) unlock unlimited tasks, 500 MB files, batch processing, and API access.
Yes. Batch PDF Processing runs entirely in your browser using WebAssembly. Your files are never uploaded to any server — they stay on your device throughout the entire process. No data is transmitted, stored, or accessible to WhiskFile or any third party.
Yes. Batch PDF Processing works on any device with a modern browser — iPhone, Android, iPad, tablets, Chromebooks, and desktop computers. No app download required. The interface adapts to your screen size automatically.
Batch PDF Processing accepts PDF files as input and produces PDF output. The maximum file size is 50 MB on the free plan (500 MB for Pro users). There are no page count limits.
See how WhiskFile compares to other PDF tools on features, pricing, and privacy.
See how professionals in different industries use this tool.
Chromebook & Linux
Any modern browser
