Your Files Never Leave
Your Browser
Every PDF tool on this site runs entirely inside your browser tab. Your documents are processed by JavaScript on your own device — no server ever receives them.
What Actually Happens When You Edit a PDF
Your Device
PDF file stays here
Browser Tab
All processing here
Your Device
Edited PDF saved here
Any Server
Never involved
The barrier between your browser and any server is physical — your file bytes never cross it.
The Technical Details
PDF.js for Rendering
Mozilla's open-source PDF.js library renders your document inside a <canvas> element. It reads the file from your device's memory — no network request is ever made for the PDF content itself.
pdf-lib for Editing
The pdf-lib library handles all modifications — merging, splitting, rotating, signing, watermarking, and more. It operates entirely on in-memory byte arrays in your browser, outputting a new file that is downloaded directly to your device.
Network Activity: Zero for Files
When you perform any PDF operation, open your browser's Network tab. You will see requests for static JavaScript and CSS bundles — but none of those requests carry your file content. The file never leaves the browser tab.
Open-Source & Auditable
The entire codebase is public on GitHub. Anyone can audit the source to confirm there is no hidden upload logic. No obfuscation, no proprietary backend, no SDK calling home.
Works Offline After Load
Once the page and its assets load, you can disconnect from the internet and all PDF tools continue to function. This is only possible because there is no server dependency for processing.
No Account, No Tracking of Files
We collect only anonymous usage metrics (page views, which tool was used) — never file names, file contents, or any personally identifiable document data. See our Privacy Policy for the full list.
Verify It Yourself in 60 Seconds
You don't have to take our word for it. Here's how to confirm with your own browser:
- 1
Open any PDF tool on this site, for example the Compress PDF tool.
- 2
Press F12 (or Cmd+Option+I on Mac) to open Developer Tools and switch to the Network tab.
- 3
Tick "Preserve log" so you don't miss anything, then clear the existing entries.
- 4
Select a PDF file and run the tool.
- 5
Inspect every network request that appears. None of them will contain your PDF data — you will only see requests for .js, .css, and .woff font files.
What We Do Collect (Transparency)
To be fully transparent: we do collect a small amount of anonymous, non-personal analytics to understand which tools are used and how the site performs. This data never includes file contents or file names.
- Page views and navigation paths
- Which tools are opened (tool ID only, e.g. "compress")
- Device type, browser, and country (aggregated)
- File names — never collected
- File contents — never collected
- IP address stored long-term — not stored
- User accounts or email addresses — we have none
Frequently Asked Questions
Does EditoraPDF upload my PDF to a server?+
No. Every PDF tool runs entirely in your browser using JavaScript and WebAssembly. Your file is loaded from your device, modified in memory, and saved back to your device — a server is never involved.
How can I verify that my file is not uploaded?+
Open DevTools → Network tab, select your PDF, and perform any operation. You will see no outgoing network request carrying your file data — only static .js / .css / font asset requests.
Is EditoraPDF safe for confidential contracts or legal documents?+
Yes. Because processing is 100% client-side, your document content never leaves your device. This makes EditoraPDF appropriate for confidential, sensitive, or legally privileged documents.
What analytics data does EditoraPDF collect?+
Only anonymous metrics: page views, which tool was used, device type, browser, and country. File names and file contents are never collected or transmitted.
Why should I trust this claim?+
Because you can independently verify it in 60 seconds using browser DevTools (see instructions above), and because the entire codebase is open source and auditable on GitHub.
Ready to Edit Securely?
Open any tool and process your PDFs with confidence — everything stays on your device.
100% free • No signup • No server uploads • Open source