Client-Side PDF Studio
A fast, private, browser-based PDF suite. Merge, split, compress, sign, redact, and scan documents with OCR—executed entirely on your device with zero server uploads.
Merge PDF
Combine multiple documents with page-to-page visual reordering.
Drag-and-drop page organizer. Rearrange pages across multiple files, rotate individual pages, duplicate or delete, and interleave two-sided scans into a single PDF.
Split PDF
Extract custom page ranges or split into individual documents.
Visual page selector with instant range syntax (e.g. 1-3, 5, 8-10). Extract marked pages, split every page into a ZIP archive, or divide by fixed intervals.
Compress PDF
Dramatic file size reduction with zero server latency.
Multi-preset image & stream optimizer with Extreme, Recommended, and Low compression tiers. Real-time DPI adjustment and live file size savings preview.
Sign PDF
Draw, type, or stamp authentic signatures on any page.
Draw with smooth ink, generate cursive calligraphy signatures, or upload photo signatures with auto-transparent background removal. Drag & scale stamps onto pages.
Redact & Edit PDF
Permanently erase content with Whiteout or add custom annotations.
Whiteout eraser tool to securely erase unwanted elements, Blackout redaction boxes for sensitive data, text annotations, and highlight overlays permanently flattened.
Scan & OCR to PDF
Snap camera photos or images into searchable documents.
Live device camera capture, scanner enhancement filters (Magic Color, B&W threshold, Grayscale), auto ISO A4 / Letter page fitting, and client-side Tesseract.js OCR.
Why Client-Side Matters
Absolute data confidentiality by architectural design
Most online PDF tools upload your contracts, tax returns, and confidential receipts to third-party cloud servers for processing. This PDF Studio uses client-side JavaScript, WebAssembly, HTML5 Canvas, and Web Workers. Your documents remain strictly inside your device's memory and are destroyed the moment you close the tab.
More from Alok Das
These interactive tools are personal side-projects built for exploration and utility. My primary professional commitment is in M.Sc. Chemistry, analytical research, and laboratory methodology.