Lossless Merge & Split
Combine multiple PDF files into one document or extract specific page ranges with lossless page transfer, entirely within browser memory.
Productivity · Document Tools
OmniPDF
Private Browser-Based PDF & Document Utilities
Private, browser-based PDF and document utilities for converting, merging, splitting, compressing, protecting, and organizing files, with local processing and no document uploads.
In-Memory Processing
Zero Document Uploads
Client-Side Security
Destructive Redaction
In-Memory
Document Execution
Zero
Document Uploads
Client-Side
PDF Engine
Free
No Subscriptions
// document suite
Verified Document Capabilities
A versatile toolkit operating in browser memory. Document contents remain strictly on your local device.
Compression with Size Guarding
Optimize PDF resources, font subsets, and object streams with output-size guarding to prevent files from growing if already compressed.
Document Conversions
Convert PDFs to editable Word documents (with layout limitations), Word to rasterized PDFs, PowerPoint text to PDF, and HEIC photos to JPG.
Destructive Page Redaction
Permanently obscure sensitive areas on selected pages via destructive rasterization, eliminating underlying vector text and hidden layers.
Client-Side Protection
Apply password encryption client-side, flatten interactive form fields and annotations, and add custom watermarks and page numbers.
CropBox & Metadata Cleaning
Adjust page viewing margins with CropBox cropping and strip Document Info and XMP metadata dictionaries locally without server assistance.
// processing model
Local Document Pipeline
1. Select Files
Load documents into the browser tab. File bytes are loaded into local memory without server transmission.
2. Client Processing
Convert, redact, split, merge, or encrypt files using JavaScript and WebAssembly libraries in the browser.
3. Direct Download
Save modified documents directly from memory to your storage. No server storage, no email delivery.
Client-Side Execution: Document manipulations execute locally using libraries like PDF.js and PDF-Lib. Static assets, fonts, and aggregated usage metrics (via GA4) load over the network, but your actual document data remains strictly in your device's memory.
// technical limitations & faqs
Frequently Asked Questions
Transparent details on capabilities, security boundaries, and limitations.
No. Document processing operations occur locally within your browser's memory using client-side WebAssembly and JavaScript libraries. Your files are not transmitted to servers for processing.
Conversions have technical limitations: PDF to Word produces editable documents but complex layouts may vary, while Word to PDF generates rasterized pages without preserving selectable vector text.
Redaction in OmniPDF permanently rasterizes the affected pages, destructively removing underlying vector text and hidden layers on those pages.
No. CropBox cropping adjusts the visible viewing boundary of a page. It is a visual adjustment and does not permanently delete cropped content outside the boundary; use redaction for permanent removal.
Not always. OmniPDF uses output-size guarding to ensure files never grow larger after optimization, but files with already compressed images or embedded streams may not decrease further.
While document contents remain strictly local, the web app loads static assets and fonts via network requests, uses Google Analytics (GA4) for aggregated site telemetry, and maintains administrative session telemetry.
Private Document Processing in Your Browser
Convert, compress, merge, and protect your files with local in-browser processing and zero document uploads.
Launch OmniPDF// network