Private by design
Private PDF Tools, Local by Default
Merge, split, compress, sign, and protect PDFs in your browser. Most PDF tools stay on your device instead of uploading files to a server.
5.0on the Chrome Web Store✓ No uploads for most tools
✓ 100% free — no accounts
✓ Works offline
✓ No tracking
Note: advanced edit features in PDF Editor can use secure temporary backend processing.
Some files should stay local. Contracts, tax forms, and medical records are good examples. Most PDF sites ask you to upload first. OnDevicePDF keeps the workflow in the browser from start to finish.
Why people choose OnDevicePDF
Most online PDF tools upload files by default. OnDevicePDF keeps most PDF tools local so your files stay on your device.
Traditional online PDF tools
You → Server → Processing → Download
OnDevicePDF
You → Browser processing → Done
How on-device PDF processing works
Choose a file. The browser processes it. Download the result.
Default path: no upload. Advanced edits in PDF Editor can use secure temporary backend processing.
🔐 No uploads for most tools
Most tools keep processing on your device. Advanced PDF Editor workflows may use secure temporary backend processing.
⚡ Instant results
Local processing means no queues, delays, or server waits.
📴 Works offline
After first load, most tools work without an internet connection.
Popular Tools
Start with the tools people use most
PDF Workflow Recipes
Create multi-step workflows to streamline repetitive tasks
- • Create a recipe with multiple PDF tool steps (e.g., Merge → Rotate → Compress)
- • Click "Start Workflow" - a progress bar appears at the top
- • IMPORTANT: After processing in each tool, click "Download" then click "Next Step"
- • The file will automatically load in the next tool
- • Add as many steps as you need - no limit!
Generate Recipe with AI Planner
Describe your goal in plain English. Example: merge, rotate pages, and compress for email.
No recipes yet
Create a workflow recipe to streamline repetitive tasks
Popular Guides
High-intent PDF how-to pages that map common search queries to the right workflow.
Guide
Delete Pages from PDF
Select the pages you do not need, remove them locally, and export the trimmed PDF once the remaining pages look right.
Guide
Add Watermark to PDF
Choose a watermark that is easy to see but still lets the page content breathe, then preview a couple of pages before exporting.
Guide
Protect a PDF With a Password
Set a strong password, save a protected copy, and reopen it once to confirm the file now asks for the password.
Guide
Redact Sensitive Information in PDF
Use true redaction blocks, not just visual cover-ups, and verify the sensitive text is gone before you send the PDF anywhere.
How on-device PDF processing works
The browser does the work on your device.
Browser-based processing
Your browser handles the PDF work with pdf-lib and PDF.js. No server is needed.
Local file handling
Files load into browser memory. Edits and conversions happen there, not on a server.
Instant results
No upload step means no waiting in a server queue. Large PDFs still depend on your device.
No server storage for local tools
On-device tools keep files in the browser session and clear them when you close the tab. Advanced PDF Editor jobs that use temporary backend processing are auto-deleted after they finish.
Who Uses OnDevicePDF?
People who want PDF tools without sending files to a server.
Students & Educators
Merge lecture notes, compress assignments to meet upload limits, organize research papers - all without creating accounts or sharing sensitive academic work.
Business Professionals
Handle contracts, invoices, and reports with complete confidentiality. No risk of sensitive business documents being stored on third-party servers.
Healthcare & Legal
Process patient records, legal documents, and confidential files while maintaining HIPAA and data protection compliance. Your device = your control.
Remote Workers
Work on PDFs from anywhere, even offline. Perfect for travelers, digital nomads, or anyone with unreliable internet who cannot wait for uploads.
Enterprise Teams
Deploy across your organization knowing zero corporate data leaves employee devices. No third-party data processing agreements needed.
Privacy-Conscious Users
If you value digital privacy, OnDevicePDF gives you full control. No tracking, no data mining, no surprises - just tools that respect you.
All Tools by Category
Complete set of PDF tools organized for easy discovery
Organize & Manipulate
Merge, split, reorder, rotate, and edit your PDF documents
Convert & Export
Transform PDFs to other formats or import from images and spreadsheets
Security
Protect your documents with passwords and remove existing protection
Optimize & Enhance
Reduce file size, add watermarks, extract text, and manage metadata
Why OnDevicePDF is different
Most online PDF tools upload files first. OnDevicePDF keeps most workflows local. Advanced editing can still use temporary backend processing.
🔐 True Privacy by Design
Most tools run in the browser. Advanced PDF Editor actions can use temporary backend jobs with auto-delete controls.
⚡ Performance Advantages
Local tools avoid upload and download delay. Advanced editor operations can use a temporary backend path for OCR and complex edits.
📴 Offline Capability
Once loaded, the app works offline. Your tools live in the browser, not on a remote server.
🛡️ Security Guarantees
Files stay in the browser session unless you download them. That removes server storage from the path.
Privacy means knowing where the file is. With OnDevicePDF, it stays with you.
Frequently Asked Questions
Quick answers about how OnDevicePDF works
Do my PDFs upload to a server?
Most tools run in your browser and keep files on your device. Advanced editing in PDF Editor can use secure temporary backend processing for OCR and complex text edits.
Can I use OnDevicePDF offline?
Yes. Once loaded, most tools work offline. Installing the app caches key assets for continued use without internet access.
Which browsers are supported?
We support current versions of Chrome, Edge, Firefox, and other Chromium-based browsers on desktop and mobile.
Is there a file size limit?
There is no hard limit. Performance depends on your device memory. Very large PDFs (100MB+) may take longer to load or process.
Is OnDevicePDF free?
Yes. No sign-up required, and we do not add watermarks. All tools are completely free to use.
How does on-device processing protect my privacy?
For on-device tools - merging, rotating, stamping, converting - every action executes locally using your browser's compute, so nothing is sent to a backend and you keep full control. A few advanced PDF Editor features (OCR, complex text edits, permanent redaction) can use secure temporary backend processing that is encrypted and auto-deleted after the job.
Still have questions?
Check our complete FAQ page or email us at team@ondevicepdf.com. We are happy to help.
Help shape what we build
Have feedback or a feature idea? Email us at team@ondevicepdf.com. We read every message and use it to decide what to build next.