Your PDFs. Your browser. No server uploads.
A simple suite of browser-native document tools. Keep your sensitive records safe by processing them entirely on your own device.
Professional Editor
Modify text, insert images, and refine layouts with total confidence. Professional tools with ZERO tracking.
Fast SyncIntelligent Merger
Combine multiple PDF documents into one seamless file instantly. Drag, drop, and you're done.
PrecisionSmart Splitter
Extract specific pages or break down massive documents into smaller, manageable files with ease.
InstantVisual Rotator
Fix crooked scans and orientations in bulk. A simple, visual way to get your PDF looking perfect.
HD QualityLean Compressor
Reduce file size for emails or storage while maintaining extreme text and image clarity.
High FidelityImage to PDF
Convert your photos and scans into professional PDF documents in high-resolution.
WebP SupportPDF to Image
Transform your PDF pages into vibrant, editable image files for presentations and sharing.
AI PoweredDeep OCR Engine
Our high-accuracy engine makes scanned text searchable and selectable in seconds.
Military GradeShield & Lock
Add bank-grade passwords and encryption to protect your sensitive documents.
Docx SupportPDF to Word
Convert complex layouts into editable Word documents with pixel-perfect accuracy.
AnonymizerMetadata Scrub
Sanitize your PDFs by wiping hidden GPS, author info, and tracking tags instantly.
Canvas ModePage Master
Reorder, delete, or duplicate pages in a visual drag-and-drop workspace.
High SecuritySmart Redaction
Physically wipe sensitive PII and data from document text permanently.
AI InsightsAI PDF Chat
Ask questions and get instant summaries from long documents using local AI.
Business Proe-Sign & Form
Sign documents and fill out interactive forms with 100% local signatures.
System FixFlatten & Repair
Fix corrupted headers and flatten complex layers for perfect printing.
Data ScanData Extractor
Detect and export PDF tables directly to clean Excel or CSV spreadsheets.
Brand ShieldWatermark Studio
Add custom text or image branding to every page with transparency control.
Eco FriendlyEco Ink Saver
Convert color PDFs to grayscale to reduce carbon footprint and printing costs.
Legal SuiteBates Stamping
Sequential page numbering for legal discovery and professional filing.
Visual DiffVisual Diff
Compare two versions of a contract and see exactly what changed side-by-side.
AccessibilityVoice to PDF
Dictate your thoughts directly into a professional document format flawlessly.
Auto HealScan Healing
Auto-crop and deskew crooked photos of documents for pro-grade scans.
Long TermPDF/A Expert
Convert documents to international standard archival format for long-term storage.
How it works.
Simple, secure, and entirely in your browser.
Local Selection
Select your files directly from your device. Our engine parses the data instantly without ever sending a single byte to a server.
Smart Processing
Our high-performance WASM engine handles the heavy lifting locally. Edit, merge, or encrypt with desktop-level speed.
Verified Output
Preview your changes and download the finalized document. Your original file remains untouched on your disk throughout.
Beyond Just Tools: Why OncePDF is the Future of Document Handling
In an era where digital privacy is increasingly scarce, OncePDF was born from a simple yet powerful realization: your documents shouldn't have to travel across the globe just to be merged or compressed. Most online PDF editors require you to upload your sensitive contracts, financial statements, and personal records to their remote servers for processing. This creates a massive security vulnerability and leaves your data outside of your control.
At OncePDF, we've engineered a better way. By leveraging advanced WebAssembly (WASM) and Edge AI technology, we bring the processing power directly to your browser. When you use our tools, your files never leave your device. The "upload" you see is merely a local selection; our engine parses and modifies your documents entirely within your browser's secure sandbox. This is 100% private, serverless document processing.
What Makes OncePDF Different?
Unlike traditional competitors, OncePDF is optimized for speed, privacy, and precision. Because we don't rely on slow server-side queues, our tools often respond sub-15 seconds for most standard documents. Whether you're a student needing to merge PDF files for a project, a professional looking to compress PDF sizes for email, or a lawyer requiring OCR PDF capabilities for discovery, OncePDF provides a desktop-class experience in a web interface.
- Zero Uploads: Your data stays on your disk.
- Bank-Grade Security: 128-bit AES local encryption.
- No Registration: Start working instantly without an account.
- Mobile Responsive: Use professional tools on the go.
A Better Alternative to Traditional Cloud Editors
While many "free PDF editors" hide behind paywalls or sell user data, OncePDF remains committed to being a free online PDF tool provider that respects your autonomy. We don't host your files, we don't track your content, and we don't limit your productivity with arbitrary file size caps. By removing the server-side middleman, we've created a leaner, faster, and infinitely more secure platform for everyone.
Experience the next generation of document management. From PDF to Word conversion to splitting massive documents, OncePDF is the only tool you'll ever need for your digital office.
Frequently Asked Questions
Common questions about home and how it works.
Is OncePDF really free to use?
How does OncePDF protect my privacy?
Do I need to install any software or extensions?
Is there a limit on how many files I can process?
Still have questions? Our support team is here to help you.
Contact Support